# A005827 (b-file synthesized from sequence entry)
0 1
1 3
2 13
3 57
4 259
5 1177
6 5367
7 24473
8 111631
9 509193
10 2322703
11 10595097
12 48330079
13 220460137
14 1005640527
15 4587282233
16 20925130111
17 95451085833
18 435405168943
19 1986123672537
20 9059808024799
21 41326792777897
22 188514347839887
23 859918153641593
24 3922562072528191
25 17892974055353673