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A272868 as a triangular array

1
11
129
131525
142252145
153090285561
163914049512062841
17492037912261602712489
186028011903864114522756060705
1972372171061742007654468134073281185

A272868 as a square array

1111111111
123456789
915223039496072
255290140203280372
14528549579111901710
5611206226138646174
284160271145220076
124892756054468
60705134073
281185
1111111111
123456789
915223039496072
255290140203280372
14528549579111901710
5611206226138646174
284160271145220076
124892756054468
60705134073
281185