# A000766 (b-file synthesized from sequence entry)
1 4
2 32
3 292
4 2672
5 24780
6 232512
7 2201948
8 20997008
9 201314448
10 1938659936
11 18737136032
12 181646110192
13 1765522809468
14 17198432462368
15 167859941774728