# A027308 (b-file synthesized from sequence entry)
1 0
2 3
3 19
4 126
5 782
6 4720
7 28158
8 167076
9 988976
10 5848884
11 34587791
12 204607678
13 1211072430
14 7173288330
15 42519596826
16 252225457356
17 1497318796416
18 8895212879140
19 52881434260371
20 314587526985030
21 1872652395544866
22 11154143632096962
23 66476020466258370