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A356184 as a triangular array

1
12
124
1236
12346
1234612
12346812
1234561012
12345681012
123456891012
1234567891012
141234567891012
14151820123456789
10121415182024

A356184 as a square array

11111111111141410
222222222211512
43333333321814
6444444432015
66655554118
12866665220
12108876324
12109874
1210985
121096
12107
128
9
11111111111141410
222222222211512
43333333321814
6444444432015
66655554118
12866665220
12108876324
12109874
1210985
121096
12107
128
9