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A181320 as a triangular array

1
11
275
6489149
2436013041697729
120300017910414404105114641
7202772024990089973015242821218745371293

A181320 as a square array

112624120720
1748360300027720
591130417910249900
49169741440899730
729410511524282
146411218745
371293
112624120720
1748360300027720
591130417910249900
49169741440899730
729410511524282
146411218745
371293