# A026657 (b-file synthesized from sequence entry)
0 1
1 3
2 8
3 18
4 40
5 84
6 182
7 378
8 814
9 1686
10 3626
11 7506
12 16138
13 33402
14 71810
15 148626
16 319522
17 661314
18 1421714
19 2942514
20 6325906
21 13092690
22 28147058
23 58255794
24 125240050
25 259208562
26 557254322
27 1153345842
28 2479497394