login

A069944 as a simple table

na(n)
11
21
31
43
512
660
7180
8630
910080
1018144
11453600
122494800
1359875200
14778377600
151089728640
1640864824000
171307674368000
1822230464256000
1915390321408000
20380140938777600
2176028187755520000
221596591942865920000

[1,1,1,3,12,60,180,630,10080,18144,453600,2494800,
 59875200,778377600,1089728640,40864824000,
 1307674368000,22230464256000,15390321408000,
 380140938777600,76028187755520000,
 1596591942865920000]