# A014274 (b-file synthesized from sequence entry)
0 0
1 1
2 1
3 1
4 5
5 15
6 50
7 180
8 676
9 2666
10 10831
11 45263
12 193097
13 839305
14 3702793
15 16552491
16 74829186
17 341652547
18 1573557441
19 7303953109
20 34139363401
21 160575404720
22 759577584604
23 3611720900930
24 17254901764792
25 82793934434748
26 398862862215977
27 1928661772504001
28 9357906461877107
29 45549820100444687