# A035800 (b-file synthesized from sequence entry)
0 1
1 60
2 1800
3 36020
4 541200
5 6516012
6 65520920
7 566262180
8 4296107040
9 29081139740
10 177923724072
11 994286700180
12 5119703270960
13 24470719227660
14 109262828065080
15 458260342666116
16 1814109445277760
17 6807471232021500