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A124560 as a triangular array

1
11
111
1121
11351
11412161
1152263661
116351584293481
117513171455371623211
1187055636341691840272194371
119928917581521992446445416552035541

A124560 as a square array

11111111111
1111111111
123456789
15122235517092
11663158317556891
166429145536347581
134837161691852199
1232140272244644
119437541655
1203554
1
11111111111
1111111111
123456789
15122235517092
11663158317556891
166429145536347581
134837161691852199
1232140272244644
119437541655
1203554
1