# A005959 (b-file synthesized from sequence entry)
2 1
3 1
4 4
5 6
6 18
7 42
8 118
9 314
10 895
11 2521
12 7307
13 21238
14 62566
15 185310
16 553288
17 1660490
18 5011299
19 15190665
20 46244031
21 141296042
22 433204573
23 1332261200
24 4108833222
25 12704949506
26 39379343929
27 122327632914
28 380778749899
29 1187544117426