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A001233 as a simple table

na(n)
61
721
8322
94536
1063273
11902055
1213339535
13206070150
143336118786
1556663366760
161009672107080
1718861567058880
18369012649234384
197551527592063024
20161429736530118960
213599979517947607200
2283637381699544802976
232021687376910682741568
2450779532534302850198976
251323714091579185857760000

[1,21,322,4536,63273,902055,13339535,206070150,
 3336118786,56663366760,1009672107080,
 18861567058880,369012649234384,7551527592063024,
 161429736530118960,3599979517947607200,
 83637381699544802976,2021687376910682741568,
 50779532534302850198976,1323714091579185857760000]