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A166994 as a triangular array

1
23
3855
41521643631
52456731846499515655135
6351216147563121755831840004723258824886629604131775
7482295526400027707792335839767711852760361479511965696

A166994 as a square array

1234567
3815243548
5521656712162295
4363131846414756315264000
99515655135217558318400027707792335839
4723258824886629604131775767711852760361479511965696
1234567
3815243548
5521656712162295
4363131846414756315264000
99515655135217558318400027707792335839
4723258824886629604131775767711852760361479511965696