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A221491 as a triangular array

0
12
222
5233
53647
654928
784115108
1041631010129
154101113620711
10158196191316525
10191015926716131613
309181426102510

A221491 as a square array

01255671015101030
2223584415199
23644161081018
34911311191514
72510136926
810106192610
8122013725
97161610
11513
2516
13
01255671015101030
2223584415199
23644161081018
34911311191514
72510136926
810106192610
8122013725
97161610
11513
2516
13