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A006845 as a simple table

na(n)
10
21
33
43
5140
6420
7840
8840
910810800
1075675600
11454053600
122270268000
139081072000
1427243216000
1554486432000
1654486432000
1752401161274029568000
18786017419110443520000
1911004243867546209280000
20143055170278100720640000

[0,1,3,3,140,420,840,840,10810800,75675600,
 454053600,2270268000,9081072000,27243216000,
 54486432000,54486432000,52401161274029568000,
 786017419110443520000,11004243867546209280000,
 143055170278100720640000]