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A173219 as a simple table

na(n)
01
12
212
3124
41800
533648
6769336
720796960
8648841680
922945907520
10907036108432
1139631833652320
121896696894062880
1398669609894805600
145543804125505195040
15334563594743197602272
1621583554094995765302592

[1,2,12,124,1800,33648,769336,20796960,648841680,
 22945907520,907036108432,39631833652320,
 1896696894062880,98669609894805600,
 5543804125505195040,334563594743197602272,
 21583554094995765302592]