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A221879 as a triangular array

1
20
321
4640
5121241
620281860
73055522761
84296120883680
9561542402301364881
107223243451640020060100
1190333728103699665028075101

A221879 as a square array

1234567891011
02612203042567290
1412285596154232333
041852120240434728
1627882305161036
0636136400996
1848200650
0860280
11075
010
1
1234567891011
02612203042567290
1412285596154232333
041852120240434728
1627882305161036
0636136400996
1848200650
0860280
11075
010
1