# A155627 (b-file synthesized from sequence entry)
0 1
1 3
2 21
3 153
4 1041
5 6753
6 42561
7 263553
8 1614081
9 9815553
10 59417601
11 358602753
12 2160005121
13 12993585153
14 78095728641
15 469111242753
16 2816814940161
17 16909479575553
18 101491237191681
19 609084862103553
20 3655058928435201