# A149613 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 15
4 63
5 239
6 1051
7 4373
8 19545
9 85189
10 387733
11 1736045
12 8005589
13 36495147
14 170006871
15 785147059
16 3686227031
17 17192251653
18 81223958909
19 381743322857
20 1812787977113
21 8572561077555
22 40882639386795
23 194310303523333
24 930015526055741
25 4438917935359283
26 21311390117273367
27 102081925144318685