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A052696 as a simple table

na(n)
01
12
212
3114
41440
522680
6428400
79439920
8237726720
96735052800
10212012640000
117341338188800
12277317497318400
1311348577278438400
14500138456661043200
1523615780481925632000
161189441481702842368000

[1,2,12,114,1440,22680,428400,9439920,237726720,
 6735052800,212012640000,7341338188800,
 277317497318400,11348577278438400,
 500138456661043200,23615780481925632000,
 1189441481702842368000]