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A022171 as a triangular array

1
11
181
157571
140028504001
1280114005014005028011
1196086865251481772006865251196081
113725733641690716531644851165316448513364169071372571
1

A022171 as a square array

111111111
1857400280119608137257
15728501400506865251336416907
14001400504817720016531644851
12801686525116531644851
119608336416907
1137257
1

A022171 as an upper right triangle

111111111
1857400280119608137257
15728501400506865251336416907
14001400504817720016531644851
12801686525116531644851
119608336416907
1137257
1

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Last modified December 19 20:36 EST 2014. Contains 252239 sequences.