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A337031 as a triangular array

5
175
52215
14889215
40035793215
1060142440593215
27005484178940993215
6720209607705184940993215
1576078412330488257185340993215
36248292168139032370978329185340993215

A337031 as a square array

517521484001060270067201576036248
52189357142454842096078412292168
521934051789770533048139032
521934091849825737097
5219340918538329
521934091853
52193409
52193
521
5
517521484001060270067201576036248
52189357142454842096078412292168
521934051789770533048139032
521934091849825737097
5219340918538329
521934091853
52193409
52193
521
5