# A027098 (b-file synthesized from sequence entry)
0 1
1 2
2 6
3 19
4 55
5 161
6 469
7 1362
8 3954
9 11483
10 33379
11 97146
12 283114
13 826214
14 2414366
15 7064217
16 20693797
17 60686847
18 178152055
19 523473326
20 1539479414
21 4531059224
22 13345835288
23 39335816471
24 116012701523
25 342356498884