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A371040 as a simple table

na(n)
01
11
22
312
496
5840
69720
7143640
82399040
945239040
10976752000
1123537606400
12621444700800
1317936155036800
14562855739846400
1519038932398886400
16690456599575142400
1726748823900403404800
181102407824344284057600
1948147134965603914240000

[1,1,2,12,96,840,9720,143640,2399040,45239040,
 976752000,23537606400,621444700800,17936155036800,
 562855739846400,19038932398886400,
 690456599575142400,26748823900403404800,
 1102407824344284057600,48147134965603914240000]