# A149872 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 13
4 42
5 138
6 491
7 1691
8 6506
9 24158
10 95110
11 359634
12 1476071
13 5814658
14 24038501
15 95389250
16 405330287
17 1652139456
18 7033071180
19 28753343889
20 124893383967
21 520653084842
22 2260016606059
23 9429634274366
24 41586641260308
25 176164600968080
26 775437292036982
27 3283769720054476
28 14645257640355143