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A263706 as a triangular array

49
475569
3588189954020
3326547410143753338769
292865141155203074581113341380355145
2600010452888405297719253630026764324148607673191484
2335502114143461755

A263706 as a square array

49475358833265292865260001023355021
569189954741011411552045288840514143461755
4020437533307458112977192536
38769133413803002676432
355145414860767
3191484
49475358833265292865260001023355021
569189954741011411552045288840514143461755
4020437533307458112977192536
38769133413803002676432
355145414860767
3191484