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A274858 as a triangular array

1
11
232
4994
82719278
168143438116
3224310011810024332
6472923333033023372964
128218754292310859235422187128
25665611260258536023602258512606561256
5121968329297253

A274858 as a square array

11248163264128256512
13927812437292187656119683
29194310023354212602929
4274311833092325857253
88110033010853602
162432339233602
327295422585
6421871260
1286561
256
11248163264128256512
13927812437292187656119683
29194310023354212602929
4274311833092325857253
88110033010853602
162432339233602
327295422585
6421871260
1286561
256