# A135413 (b-file synthesized from sequence entry)
1 1
2 2
3 6
4 20
5 70
6 246
7 875
8 3144
9 11385
10 41470
11 151778
12 557712
13 2056210
14 7602700
15 28180050
16 104677280
17 389571983
18 1452293766
19 5422187130
20 20271296100
21 75878518695
22 284339792110
23 1066585128810
24 4004566131000
25 15048213795600