diff --git a/src/eval/eval_types.c b/src/eval/eval_types.c
index 4db7e20d..44d8c57a 100644
--- a/src/eval/eval_types.c
+++ b/src/eval/eval_types.c
@@ -2281,6 +2281,37 @@ E_TYPE_EXPAND_NUM_FROM_ID_FUNCTION_DEF(identity)
   return id;
 }
 
+////////////////////////////////
+//~ rjf: (Built-In Type Hooks) `sequence` lens
+
+E_TYPE_EXPAND_INFO_FUNCTION_DEF(sequence)
+{
+  E_Type *type = e_type_from_key__cached(irtree->type_key);
+  U64 count = 0;
+  {
+    Temp scratch = scratch_begin(&arena, 1);
+    E_OpList count_oplist = e_oplist_from_irtree(scratch.arena, irtree->root);
+    String8 count_bytecode = e_bytecode_from_oplist(scratch.arena, &count_oplist);
+    E_Interpretation count_interpret = e_interpret(count_bytecode);
+    E_Value count_value = count_interpret.value;
+    count = count_value.u64;
+    scratch_end(scratch);
+  }
+  E_TypeExpandInfo info = {0, count};
+  return info;
+}
+
+E_TYPE_EXPAND_RANGE_FUNCTION_DEF(sequence)
+{
+  U64 read_range_count = dim_1u64(idx_range);
+  for(U64 idx = 0; idx < read_range_count; idx += 1)
+  {
+    E_Expr *expr = e_push_expr(arena, E_ExprKind_LeafU64, 0);
+    expr->value.u64 = idx_range.min + idx;
+    exprs_out[idx] = expr;
+  }
+}
+
 ////////////////////////////////
 //~ rjf: (Built-In Type Hooks) `array` lens
 
diff --git a/src/eval/eval_types.h b/src/eval/eval_types.h
index bdc52766..ae1c3dd5 100644
--- a/src/eval/eval_types.h
+++ b/src/eval/eval_types.h
@@ -309,6 +309,12 @@ E_TYPE_EXPAND_RANGE_FUNCTION_DEF(default);
 E_TYPE_EXPAND_ID_FROM_NUM_FUNCTION_DEF(identity);
 E_TYPE_EXPAND_NUM_FROM_ID_FUNCTION_DEF(identity);
 
+////////////////////////////////
+//~ rjf: (Built-In Type Hooks) `sequence` lens
+
+E_TYPE_EXPAND_INFO_FUNCTION_DEF(sequence);
+E_TYPE_EXPAND_RANGE_FUNCTION_DEF(sequence);
+
 ////////////////////////////////
 //~ rjf: (Built-In Type Hooks) `array` lens
 
diff --git a/src/eval_visualization/eval_visualization_core.c b/src/eval_visualization/eval_visualization_core.c
index 5a095cbf..e4ae439a 100644
--- a/src/eval_visualization/eval_visualization_core.c
+++ b/src/eval_visualization/eval_visualization_core.c
@@ -84,17 +84,33 @@ ev_type_key_and_mode_is_expandable(E_TypeKey type_key, E_Mode mode)
 {
   B32 result = 0;
   {
-    E_TypeKey expand_type_key = e_default_expansion_type_from_key(type_key);
-    E_TypeKind expand_type_kind = e_type_kind_from_key(expand_type_key);
-    if(expand_type_kind == E_TypeKind_Struct ||
-       expand_type_kind == E_TypeKind_Union ||
-       expand_type_kind == E_TypeKind_Class ||
-       expand_type_kind == E_TypeKind_Array ||
-       expand_type_kind == E_TypeKind_Set ||
-       e_type_kind_is_pointer_or_ref(expand_type_kind) ||
-       (expand_type_kind == E_TypeKind_Enum && mode == E_Mode_Null))
+    if(e_type_kind_from_key(type_key) == E_TypeKind_Lens)
     {
-      result = 1;
+      for(E_Type *lens_type = e_type_from_key__cached(type_key);
+          lens_type->kind == E_TypeKind_Lens;
+          lens_type = e_type_from_key__cached(lens_type->direct_type_key))
+      {
+        if(lens_type->expand.info != 0)
+        {
+          result = 1;
+          break;
+        }
+      }
+    }
+    else
+    {
+      E_TypeKey expand_type_key = e_default_expansion_type_from_key(type_key);
+      E_TypeKind expand_type_kind = e_type_kind_from_key(expand_type_key);
+      if(expand_type_kind == E_TypeKind_Struct ||
+         expand_type_kind == E_TypeKind_Union ||
+         expand_type_kind == E_TypeKind_Class ||
+         expand_type_kind == E_TypeKind_Array ||
+         expand_type_kind == E_TypeKind_Set ||
+         e_type_kind_is_pointer_or_ref(expand_type_kind) ||
+         (expand_type_kind == E_TypeKind_Enum && mode == E_Mode_Null))
+      {
+        result = 1;
+      }
     }
   }
   return result;
diff --git a/src/raddbg/raddbg_core.c b/src/raddbg/raddbg_core.c
index 55492ef2..ca291bd4 100644
--- a/src/raddbg/raddbg_core.c
+++ b/src/raddbg/raddbg_core.c
@@ -12365,6 +12365,7 @@ rd_frame(void)
         {str8_lit("digits"),      1, 1, 0,        0, 0, {0}},
         {str8_lit("no_string"),   1, 1, 0,        0, 0, {0}},
         {str8_lit("no_addr"),     1, 1, 0,        0, 0, {0}},
+        {str8_lit("sequence"),    0, 0, 1,        0, 0, {E_TYPE_EXPAND_INFO_FUNCTION_NAME(sequence), E_TYPE_EXPAND_RANGE_FUNCTION_NAME(sequence)}},
         {str8_lit("range1"),      0, 0, 0,        0, 0, {0}},
         {str8_lit("array"),       0, 0, 1,        0, 0, {E_TYPE_EXPAND_INFO_FUNCTION_NAME(array), E_TYPE_EXPAND_RANGE_FUNCTION_NAME(array)}},
         {str8_lit("slice"),       0, 0, 1,        E_TYPE_IREXT_FUNCTION_NAME(slice), E_TYPE_ACCESS_FUNCTION_NAME(slice), {E_TYPE_EXPAND_INFO_FUNCTION_NAME(slice), E_TYPE_EXPAND_RANGE_FUNCTION_NAME(slice)}},