# A149700 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 17
4 69
5 277
6 1175
7 4991
8 21707
9 95019
10 420485
11 1872483
12 8392935
13 37803043
14 171044287
15 776817969
16 3540037073
17 16179841235
18 74148407971
19 340610270961
20 1568026396723
21 7232622699345
22 33420763418641
23 154684729671295
24 717026052876837
25 3328341395275273
26 15469743336597625
27 71988145309748133