# A005957 (b-file synthesized from sequence entry)
1 1
2 1
3 2
4 3
5 8
6 18
7 47
8 123
9 338
10 935
11 2657
12 7616
13 22138
14 64886
15 191873
16 571169
17 1711189
18 5153883
19 15599094
20 47415931
21 144692886
22 443091572
23 1361233280
24 4194107380
25 12957209782
26 40128629400
27 124562327944
28 387467513732
29 1207633413980