# A005162 (b-file synthesized from sequence entry)
1 1
2 2
3 3
4 8
5 15
6 52
7 126
8 568
9 1782
10 10436
11 42471
12 323144
13 1706562
14 16866856
15 115640460
16 1484714416
17 13216815036
18 220426128584
19 2548124192970