# A149097 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 8
4 33
5 85
6 369
7 1079
8 4811
9 15263
10 69320
11 232480
12 1069395
13 3735813
14 17351692
15 62541448
16 292641635
17 1081249221
18 5089473600
19 19187812058
20 90753730279
21 347934682697
22 1652262396851
23 6424923779881
24 30613860682437
25 120499305565195
26 575826681275548
27 2290541991358632
28 10973200218688887