# A027093 (b-file synthesized from sequence entry)
3 1
4 1
5 5
6 17
7 57
8 190
9 623
10 2010
11 6395
12 20103
13 62561
14 193062
15 591637
16 1802551
17 5465275
18 16503365
19 49665179
20 149033583
21 446131159
22 1332749213
23 3974445543
24 11834777320
25 35196098205
26 104558824915
27 310332568225
28 920350334943