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A183680 as a triangular array

344
20802080
134481008813448
90784544965449690784
631784316232252920316232631784
449776019316801287136128713619316804497760
32592008122673687003928583632870039281226736832592008
239551264

A183680 as a square array

34420801344890784631784449776032592008239551264
20801008854496316232193168012267368
134485449625292012871367003928
9078431623212871365836328
63178419316807003928
449776012267368
32592008
34420801344890784631784449776032592008239551264
20801008854496316232193168012267368
134485449625292012871367003928
9078431623212871365836328
63178419316807003928
449776012267368
32592008