# A061695 (b-file synthesized from sequence entry)
1 1
2 27
3 864
4 36000
5 1944000
6 133358400
7 11379916800
8 1185137049600
9 148142131200000
10 21908575180800000
11 3785801791242240000
12 756127866850836480000
13 172901238886557941760000
14 44887821634010234880000000
15 13132894100921851576320000000
16 4301460581188603786297344000000