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A153868 as a triangular array

1
21
333
46129
510304531
61560135186121
721105315651847523
8281686301736338841842469

A153868 as a square array

12345678
13610152128
3123060105168
945135315630
311866511736
1218473388
5234184
2469
12345678
13610152128
3123060105168
945135315630
311866511736
1218473388
5234184
2469