# A146877 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 1
5 1
6 1
7 1
8 13
9 37
10 65
11 121
12 421
13 1309
14 3649
15 15177
16 81237
17 474405
18 2569641
19 13240801
20 84039101
21 586237485