# A126402 (b-file synthesized from sequence entry)
0 1
1 15
2 69
3 325
4 1543
5 7361
6 35223
7 168899
8 811105
9 3899407
10 18761375
11 90319881
12 434998065
13 2095690739
14 10098729091
15 48672013183
16 234609419433
17 1130969299775
18 5452365150693
19 26286944474683
20 126739125460983