# A126396 (b-file synthesized from sequence entry)
0 1
1 9
2 39
3 175
4 793
5 3611
6 16475
7 75229
8 343633
9 1569883
10 7172423
11 32769925
12 149723361
13 684077955
14 3125520983
15 14280373781
16 65246447425
17 298108406323
18 1362045450407
19 6223131628517
20 28433241805745
21 129910355608771