# A148280 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 4
4 16
5 46
6 193
7 622
8 2701
9 9325
10 42182
11 154184
12 711849
13 2705836
14 12670859
15 49549930
16 234642749
17 938567225
18 4481414935
19 18256143420
20 87727604158
21 362745516847
22 1752161026619
23 7335659037548
24 35582376864192
25 150551110627071
26 732790706277408
27 3128696622216073
28 15272684090284663