# A012719 (b-file synthesized from sequence entry)
0 1
1 0
2 1
3 6
4 37
5 260
6 2365
7 24850
8 301033
9 4051848
10 60901145
11 1003420638
12 18072389069
13 352027414284
14 7390186076949
15 166110699895530
16 3983896292586577
17 101488729722338064
18 2737830394817774257