# A306900 (b-file synthesized from sequence entry)
0 0
1 1
2 6
3 32
4 169
5 921
6 5248
7 31388
8 197133
9 1298804
10 8962070
11 64646382
12 486545028
13 3813611643
14 31075203744
15 262802902944
16 2303066401903
17 20883838079019
18 195682855232648
19 1892280736283390
20 18862445424597027
21 193603796552389848
22 2044036227150998116
23 22177186058234124636