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A257501 as a triangular array

1
41
1481
4844121
16520890161
572910544152201
2002380829071120230241
7072155041436470842000324281
25194620166729840480146253248434321
9044024515730360021528095004269704928560361

A257501 as a square array

141448165572200270722519490440
184420891038081550462016245157
1129054429071436467298303600
1161521120708440480215280
12023020001462595004
124324324826970
1284344928
132560
136
1
141448165572200270722519490440
184420891038081550462016245157
1129054429071436467298303600
1161521120708440480215280
12023020001462595004
124324324826970
1284344928
132560
136
1