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A028421 as a triangular array

1
12
263
622184
24100105405
120548675340756
7203528487229408751267
5040261363939627076980019321968
403202191683543722691361122452721638222889

A028421 as a square array

112624120720504040320
2622100548352826136219168
318105675487239396354372
440340294027076269136
5758759800112245
6126193227216
71963822
8288
9
112624120720504040320
2622100548352826136219168
318105675487239396354372
440340294027076269136
5758759800112245
6126193227216
71963822
8288
9