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A007685 as a simple table

na(n)
01
12
212
3240
416800
54233600
63911846400
713425456844800
8172785629592576000
98400837310791045120000
101552105098192510332190720000
111094904603628138948657963991040000
122960792853328653706847125274154762240000
1330794022150329995743434211126374020153344000000

[1,2,12,240,16800,4233600,3911846400,
 13425456844800,172785629592576000,
 8400837310791045120000,
 1552105098192510332190720000,
 1094904603628138948657963991040000,
 2960792853328653706847125274154762240000,
 30794022150329995743434211126374020153344000000]