# A365584 (b-file synthesized from sequence entry)
0 1
1 3
2 24
3 300
4 5100
5 109692
6 2854344
7 87164088
8 3055516800
9 120916282368
10 5331444120576
11 259168711406976
12 13769882994784896
13 793844510730348672
14 49353915922852214016
15 3291455140392403401984
16 234388011123877880424960
17 17750517946502792294592000