# A148877 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 8
4 30
5 93
6 359
7 1209
8 4730
9 16655
10 65691
11 237665
12 941630
13 3468116
14 13778724
15 51387436
16 204534160
17 769868698
18 3068092161
19 11630032273
20 46389072310
21 176824017758
22 705754225977
23 2702266273070
24 10790600421380
25 41469337360702
26 165652900932831
27 638598964506103
28 2551632767608252