# A155603 (b-file synthesized from sequence entry)
0 1
1 7
2 33
3 151
4 705
5 3367
6 16353
7 80311
8 397185
9 1972807
10 9824673
11 49005271
12 244672065
13 1222297447
14 6108298593
15 30531927031
16 152630937345
17 763068593287
18 3815084686113
19 19074648589591
20 95370918425025
21 476847618556327