# A149590 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 15
4 57
5 217
6 863
7 3437
8 14245
9 58719
10 248277
11 1047681
12 4500453
13 19296867
14 83883423
15 364076061
16 1597411029
17 6999282601
18 30941709011
19 136616489201
20 607700266033
21 2700153649275
22 12073795188291
23 53931950506355
24 242236477166959
25 1086946964513947
26 4900932467767547
27 22077413679763581