# A037570 (b-file synthesized from sequence entry)
1 2
2 11
3 57
4 287
5 1436
6 7182
7 35912
8 179561
9 897807
10 4489037
11 22445186
12 112225932
13 561129662
14 2805648311
15 14028241557
16 70141207787
17 350706038936
18 1753530194682
19 8767650973412
20 43838254867061
21 219191274335307
22 1095956371676537