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A171005 as a simple table

na(n)
34
415
572
6420
72880
822680
9201600
101995840
1121772800
12259459200
133353011200
1446702656000
15697426329600
1611115232128000
17188305108992000
183379030566912000
1964023737057280000
201277273554292736000
2126761922089943040000
22587545834974658560000
2313488008733331292160000

[4,15,72,420,2880,22680,201600,1995840,21772800,
 259459200,3353011200,46702656000,697426329600,
 11115232128000,188305108992000,3379030566912000,
 64023737057280000,1277273554292736000,
 26761922089943040000,587545834974658560000,
 13488008733331292160000]