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A125906 as a triangular array

1
51
26101
14077151
777540153201
442536301325254251
2575523900105092620380301
15267515576479065239894550531351
9191391010560575078203560472707240707401

A125906 as a square array

1526140777442525755152675919139
110775403630239001557641010560
11515313251050979065575078
120254262023989203560
125380455047270
1305317240
135707
140
1
1526140777442525755152675919139
110775403630239001557641010560
11515313251050979065575078
120254262023989203560
125380455047270
1305317240
135707
140
1