# A027129 (b-file synthesized from sequence entry)
0 1
1 3
2 9
3 27
4 79
5 231
6 672
7 1951
8 5662
9 16439
10 47776
11 139025
12 405110
13 1182107
14 3454035
15 10105373
16 29600389
17 86800887
18 254797772
19 748646741
20 2201587214
21 6479524339
22 19084115993
23 56246912653
24 165882843095
25 489509315203