# A000942 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 3
5 4
6 12
7 26
8 77
9 204
10 624
11 1817
12 5585
13 17007
14 52803
15 164001
16 514009
17 1615044
18 5100324
19 16152134
20 51324864