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A327927 as a simple table

na(n)
01
11
22
36
430
5150
61020
77140
863420
9611100
106625080
1172875880
12977213160
1312876743880
14190951160400
152975661889200
1651767677962000
17886225654314000
1817136230971860000
19329530590793404000
207035395004749311200
21151961029211943151200

[1,1,2,6,30,150,1020,7140,63420,611100,6625080,
 72875880,977213160,12876743880,190951160400,
 2975661889200,51767677962000,886225654314000,
 17136230971860000,329530590793404000,
 7035395004749311200,151961029211943151200]