# A149520 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 11
4 49
5 157
6 705
7 2447
8 11257
9 42215
10 196039
11 760457
12 3578149
13 14323343
14 67808827
15 276672895
16 1319635789
17 5479101635
18 26238372575
19 110300159347
20 530694254439
21 2256204576997
22 10885696948113
23 46685442018077
24 225970476634309
25 976854488592583
26 4737916116106503
27 20615097104712731