# A006205 (b-file synthesized from sequence entry)
1 0
2 0
3 1
4 0
5 2
6 2
7 4
8 14
9 52
10 555
11 1257
12 7934
13 66757
14 336297
15 2558894
16 33642945
17 250637748
18 1653170339