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A272400 as a triangular array

1
23
364
5987
71512146
112120211212
1333283518248
1739444930361615
195152774260243013
23576891668440452618
296976119781325675393612
3187921331021568810565542428

A272400 as a square array

1235711131719232931
3691521333951576987
481220284452687692
7142135497791119133
6121830426678102
1224366084132156
81624405688
15304575105
13263965
183654
1224
28
1235711131719232931
3691521333951576987
481220284452687692
7142135497791119133
6121830426678102
1224366084132156
81624405688
15304575105
13263965
183654
1224
28