# A026026 (b-file synthesized from sequence entry)
2 1
3 3
4 10
5 35
6 125
7 451
8 1638
9 5980
10 21930
11 80750
12 298452
13 1106921
14 4118725
15 15371475
16 57528750
17 215867880
18 811985790
19 3061229850
20 11565545100
21 43782423750
22 166051490514
23 630877833102
24 2400830868860
25 9150602070760
26 34927775872500
27 133502608167292