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A174909 as a triangular array

1
13
2515
81435105
48881543851155
48062411442002500515015
5760816010608194483403485085255255
9216010944015504020155236951264664616166154849845
1658880211968025171203565920

A174909 as a square array

1128484805760921601658880
35148862481601094402119680
15351541144106081550402517120
1053852002194482015523565920
1155500534034369512
1501585085646646
2552551616615
4849845
1128484805760921601658880
35148862481601094402119680
15351541144106081550402517120
1053852002194482015523565920
1155500534034369512
1501585085646646
2552551616615
4849845