# A037129 (b-file synthesized from sequence entry)
0 0
1 1
2 3
3 9
4 33
5 107
6 333
7 1036
8 3153
9 9583
10 29010
11 87557
12 263679
13 793061
14 2383280
15 7158069
16 21490605
17 64504548
18 193579176
19 580868607
20 1742867913
21 5229128045
22 15688432647
23 47067395121
24 141206379612
25 423627527495
26 1270899359726
27 3812731633623
28 11438262009764