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A255812 as a triangular array

1
11
121
1831
116941
1128813251
12562431282561
1102472920481257271
120486561819262512964981
1327681968365536156253110434312891
1655365904926214478125

A255812 as a square array

11111111111
12816128256102420483276865536
1398124372965611968359049
14321282048819265536262144
15251256251562578125
1672129631104
1749343
18128
19
1
11111111111
12816128256102420483276865536
1398124372965611968359049
14321282048819265536262144
15251256251562578125
1672129631104
1749343
18128
19
1