# A047042 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 5
4 14
5 56
6 202
7 715
8 2529
9 9701
10 36797
11 138564
12 520062
13 1999679
14 7700373
15 29612097
16 113722740
17 440354696
18 1709283358
19 6637835682
20 25773923006
21 100398993203
22 391785231463
23 1530125311638
24 5978033636691
25 23390474605783