# A075721 (b-file synthesized from sequence entry)
0 2
1 3
2 4
3 5
4 8
5 14
6 26
7 92
8 356
9 1412
10 5636
11 185559
12 556671
13 21152738
14 42305474
15 2919075981
16 14595379885
17 102167659153
18 3882371047054
19 361060507372953
20 16969843846526629
21 1561225633880447476
22 6244902535521789892