# A000762 (b-file synthesized from sequence entry)
3 1
4 16
5 144
6 984
7 5756
8 30760
9 155912
10 766424
11 3698848
12 17648312
13 83558828
14 393534176
15 1846227984
16 8637479208
17 40325165648
18 187980582568
19 875268197452
20 4072021100336
21 18931821861960
22 87979249474568