# A149217 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 10
4 42
5 136
6 598
7 2162
8 9815
9 37636
10 174615
11 694695
12 3271551
13 13352629
14 63547908
15 264327829
16 1267696988
17 5350969987
18 25811875559
19 110238766866
20 534157611947
21 2303345758002
22 11200561768291
23 48687212201572
24 237436053622265
25 1039149699997593
26 5079720276433999
27 22362113435873612