# A032151 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 4
5 8
6 38
7 266
8 1680
9 10668
10 87444
11 1057140
12 10108644
13 114112320
14 1404689244
15 20654453736
16 294649177704
17 4556106886632
18 76389128377296
19 1363358922375072
20 25400563124152944
21 497084494996824840