# A156075 (b-file synthesized from sequence entry)
-1 1
0 3
1 10
2 60
3 560
4 6960
5 108160
6 2016960
7 43880960
8 1091055360
9 30518978560
10 948529167360
11 32428291727360
12 1209444693749760
13 48866368072744960
14 2126271870148853760
15 99126722911299829760
16 4929370112679276380160
17 260448010952742716047360
18 14570492989330164551516160