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A048471 as a triangular array

1
21
531
14951
41271791
122815333171
36524316110565331
1094729485321209129651
3281218714579696414172571291
984265614373291319371281833513

A048471 as a square array

1251441122365109432819842
139278124372921876561
15175316148514574373
19331053219692913
117652096411937
1331294171281
165257833
1129513
1
1251441122365109432819842
139278124372921876561
15175316148514574373
19331053219692913
117652096411937
1331294171281
165257833
1129513
1