# A149068 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 11
4 42
5 169
6 721
7 3105
8 13838
9 62047
10 283633
11 1303734
12 6061730
13 28318686
14 133282890
15 629750099
16 2990908792
17 14249878475
18 68148765938
19 326757727504
20 1571225170941
21 7571392176951
22 36566846891408
23 176917128336520
24 857500703098429
25 4162433708763959
26 20234912112599861
27 98493026288524495