# A007163 (b-file synthesized from sequence entry)
1 1
2 3
3 10
4 39
5 158
6 674
7 2944
8 13191
9 60078
10 277890
11 1300536
12 6151078
13 29346036
14 141088632
15 682825140
16 3324172359
17 16267134462
18 79975707362
19 394833880540
20 1956620531762
21 9729300574580
22 48529814786620
23 242757311049680
24 1217508537475894