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A263519 as a triangular array

3
78
153523
2916020866
5366020761198190
93265118369259687022547
15910350158109489294331130410351575
26739807131778090518571333209642130022402374535
44315146310791350162207955

A263519 as a square array

3715295393159267443
83516066026511035039807151463
23208207618369158109131778010791350
661198259684892949051857162207955
190702233113013332096
547410354213002
1575240237
4535
3715295393159267443
83516066026511035039807151463
23208207618369158109131778010791350
661198259684892949051857162207955
190702233113013332096
547410354213002
1575240237
4535