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A173881 as a triangular array

1
11
121
1661
11236121
120120120201
130300600300301
14263021002100630421
15611765880980058801176561
1722016141123528035280141122016721
190324030240105840158760

A173881 as a square array

11111111111
12612203042567290
1636120300630117620163240
112120600210058801411230240
1203002100980035280105840
130630588035280158760
142117614112
1562016
172
1

A173881 as an upper right triangle

11111111111
12612203042567290
1636120300630117620163240
112120600210058801411230240
1203002100980035280105840
130630588035280158760
142117614112
1562016
172
1

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Last modified August 7 15:20 EDT 2020. Contains 336276 sequences. (Running on oeis4.)