# A045631 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 20
5 70
6 243
7 889
8 3276
9 12276
10 46435
11 176869
12 677022
13 2602197
14 10033212
15 38787495
16 150286400
17 583434322
18 2268848988
19 8836447021
20 34461894010
21 134564992002
22 526025788992
23 2058359779051
24 8061905110548
25 31602659997975