# A150578 (b-file synthesized from sequence entry)
0 1
1 2
2 7
3 26
4 109
5 449
6 1995
7 8648
8 39542
9 177391
10 824142
11 3780180
12 17757683
13 82638051
14 391512994
15 1840788102
16 8778125385
17 41599169813
18 199370832862
19 950717604657
20 4574750880399
21 21924045003490
22 105846504118961
23 509316666679058
24 2465797422256411
25 11904956817171765
26 57773578111490989
27 279724927288607769