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A091320 as a triangular array

1
21
471
830161
16104122301
32320660365501
6491229202875903771
12824641131217430985619601121
25664003987288592789742856038641561
512161281309443964805123162940427300870742101

A091320 as a square array

1248163264128256512
17301043209122464640016128
11612266029201131239872130944
13036528751743088592396480
150903985678974512316
177196028560294042
1112386473008
11567074
1210
1
1248163264128256512
17301043209122464640016128
11612266029201131239872130944
13036528751743088592396480
150903985678974512316
177196028560294042
1112386473008
11567074
1210
1