# A149279 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 11
4 44
5 133
6 585
7 2067
8 9140
9 33151
10 152215
11 588887
12 2707930
13 10600185
14 49739802
15 201846411
16 947313436
17 3868920739
18 18391118427
19 76883715861
20 365360718030
21 1533300578107
22 7351469941530
23 31365481220103
24 150308154051392
25 642895593975493
26 3101248214292475
27 13430224560698267