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A286897 as a triangular array

1
51
2361
1093371
5441824581
287610342845991
161136122181542075101
954953792711931298759593111
59715524603081205216204665814113121
392924316699415737241606073690069791082135131

A286897 as a square array

1523109544287616113954955971553929243
163318210346122379272460301669941
174528418151193181205573724
1859420298721620160607
1975595466536900
110938146979
1111131082
112135
113
1
1523109544287616113954955971553929243
163318210346122379272460301669941
174528418151193181205573724
1859420298721620160607
1975595466536900
110938146979
1111131082
112135
113
1