# A126476 (b-file synthesized from sequence entry)
0 1
1 8
2 44
3 252
4 1446
5 8300
6 47642
7 273466
8 1569700
9 9010108
10 51718192
11 296863410
12 1704001644
13 9781001986
14 56143138234
15 322262685896
16 1849793972828
17 10617852738356
18 60946677537854
19 349835093256180
20 2008060117756986