# A149847 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 14
4 46
5 134
6 502
7 1820
8 5980
9 23198
10 87922
11 306836
12 1216060
13 4729934
14 17121082
15 68851202
16 272448226
17 1010816594
18 4108318162
19 16458898196
20 62164300252
21 254714419202
22 1030026465334
23 3943455360182
24 16261959193558
25 66245444855966
26 256342162541710
27 1062615874236728
28 4354486276936816