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A221328 as a triangular array

1
31
7171
17119991
4186620085771
996328461053387333631
2394621110100782460824571358196011
5773372742218185516243098113134780796373221142431
1393246091848733585710794156688

A221328 as a square array

1371741992395771393
1171198666328462113372742460918
199200846105101007822181855487335857
157733873246082416243098110794156688
13363571358131347807
1196019637322
1114243
1
1371741992395771393
1171198666328462113372742460918
199200846105101007822181855487335857
157733873246082416243098110794156688
13363571358131347807
1196019637322
1114243
1