# A125656 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 13
4 47
5 195
6 908
7 4674
8 26327
9 160825
10 1057575
11 7440520
12 55714863
13 442052441
14 3701932760
15 32610988520
16 301289654059
17 2911657603468
18 29363468538215
19 308365818949091
20 3365801354839753
21 38117461277764685