# A149734 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 17
4 75
5 303
6 1389
7 6045
8 28317
9 127803
10 606887
11 2801619
12 13424071
13 62911801
14 303379905
15 1437067481
16 6962892139
17 33245183393
18 161666164103
19 776608858891
20 3787408372649
21 18281348949173
22 89363341487161
23 433014462826249
24 2120749997875277
25 10308769555144033
26 50570373773643695
27 246466322437473967