# A217061 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 15
4 109
5 1053
6 12767
7 186763
8 3204313
9 63128665
10 1404963387
11 34867190823
12 954800951749
13 28600649870133
14 930325531322519
15 32658109219519843
16 1230609634110271921
17 49545182501048868145