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A066319 as a simple table

na(n)
11
21
36
496
53000
6155520
712101040
81321205760
9192849310080
1036288000000000
118556520581100800
122471543044256563200
13858447696200353459200
14353034171594345598156800
15169665960401437500000000000

[1,1,6,96,3000,155520,12101040,1321205760,
 192849310080,36288000000000,8556520581100800,
 2471543044256563200,858447696200353459200,
 353034171594345598156800,
 169665960401437500000000000]