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A374839 as a triangular array

1
31
771
1535231
311554032791
63651660371827658151
127266710629918394315431332366742950331111
255107951703451470905093928267799823482718447026751295461523184467440780045847271

A374839 as a square array

137153163127255
1735155651266710795
12340366031062991703451
127971827183943154709050939
1658154313323667282677998234827
1429503311118447026751295461523
118446744078004584727
1
137153163127255
1735155651266710795
12340366031062991703451
127971827183943154709050939
1658154313323667282677998234827
1429503311118447026751295461523
118446744078004584727
1