# A167017 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 14
4 105
5 1080
6 13916
7 212634
8 3723198
9 73047825
10 1581256303
11 37350588290
12 954796686233
13 26246234745486
14 771853099673490
15 24180166328032252
16 803996438505301917
17 28283254774663359546
18 1049653570430645994556