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A223363 as a simple table

na(n)
121
290
3420
41992
59552
645984
7221760
81070208
95166336
1024943104
11120431616
12581486592
132807648256
1413556490240
1565456455680
16316051587072
171526031777792
187368332673024
1935577456230400
20171783152467968
21829442428502016

[21,90,420,1992,9552,45984,221760,1070208,5166336,
 24943104,120431616,581486592,2807648256,
 13556490240,65456455680,316051587072,
 1526031777792,7368332673024,35577456230400,
 171783152467968,829442428502016]