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A257740 as a triangular array

1
01
023
031413
054911473
071486721028501
01142733349182103104051
0151170150306658412948511440237633
022315063978428653128581519180831394414394353
03082882618802557972111176002491706030044014185367444596553

A257740 as a square array

1000000000
1235711152230
31449148427117031508288
1311467233341503063978261880
7310289182665844286532557972
50110310129485128581511117600
4051114402191808324917060
37633139441430044014
39435318536744
4596553
1000000000
1235711152230
31449148427117031508288
1311467233341503063978261880
7310289182665844286532557972
50110310129485128581511117600
4051114402191808324917060
37633139441430044014
39435318536744
4596553