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A066987 as a simple table

na(n)
23
312
442
5252
61512
712096
860480
9393120
103538080
1142456960
12396264960
135547709440
1466572513280
15798870159360
166191243735040
17111442387230720
181448751033999360
1928975020679987200
20405650289519820800

[3,12,42,252,1512,12096,60480,393120,3538080,
 42456960,396264960,5547709440,66572513280,
 798870159360,6191243735040,111442387230720,
 1448751033999360,28975020679987200,
 405650289519820800]