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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

A257016 as a simple table

na(n)
16508512
2717382656
382198167552
49418319069184
51067360882688000
6120962057616000000
713755268072643328000
81564188006382373965824
9177670834801998001035264
1020181030292033938199471104

[6508512,717382656,82198167552,9418319069184,
 1067360882688000,120962057616000000,
 13755268072643328000,1564188006382373965824,
 177670834801998001035264,
 20181030292033938199471104]