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A172288 as a triangular array

1
21
231
2491
24251291
24354225327691
24364790526846822521474836491
2436222241733276217345115292150675433062592233720368547758091

A172288 as a square array

12222222
1344444
1925353636
1129422547905222241
132769268468225733276217345
121474836491152921506754330625
19223372036854775809
1

A172288 as an upper right triangle

12222222
1344444
1925353636
1129422547905222241
132769268468225733276217345
121474836491152921506754330625
19223372036854775809
1

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Last modified May 28 17:37 EDT 2020. Contains 334684 sequences. (Running on oeis4.)