# A087297 (b-file synthesized from sequence entry)
0 1
1 6
2 27
3 160
4 1169
5 12980
6 168909
7 2871742
8 54563459
9 1254960086
10 36393843335
11 1128209144346
12 41743738342171
13 1711493272030692
14 73594210697321605
15 3458927902774117644
16 183323178847028237941
17 10816067551974666042000