# A146940 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 3
5 5
6 9
7 19
8 60
9 189
10 892
11 3177
12 18960
13 89571
14 754227
15 4905159
16 53337014
17 466215312
18 6729449504
19 78188089715
20 1533329125669