# A037709 (b-file synthesized from sequence entry)
1 1
2 7
3 30
4 120
5 481
6 1927
7 7710
8 30840
9 123361
10 493447
11 1973790
12 7895160
13 31580641
14 126322567
15 505290270
16 2021161080
17 8084644321
18 32338577287
19 129354309150
20 517417236600
21 2069668946401
22 8278675785607
23 33114703142430
24 132458812569720
25 529835250278881
26 2119341001115527