# A000513 (b-file synthesized from sequence entry)
1 0
2 0
3 0
4 1
5 1
6 4
7 16
8 194
9 3529
10 121790
11 5582612
12 317579783
13 21543414506
14 1711281449485
15 157117486414656
16 16502328443493967
17 1965612709107379155
18 263512349078757245789
19 39497131936385398782814
20 6579940884199010139737829
21 1211896874083479131415289345
22 245593008009270037388205883048