# A149296 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 11
4 46
5 153
6 677
7 2455
8 11106
9 42895
10 198457
11 791305
12 3702406
13 15165773
14 71734282
15 299266047
16 1425366120
17 6033876043
18 28912348233
19 123853219579
20 596225571156
21 2578099387973
22 12458031648720
23 54309706631855
24 263290014989332
25 1155465606500309
26 5616411745913101
27 24793271401695375