# A149933 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 15
4 49
5 165
6 584
7 2134
8 7930
9 30004
10 115286
11 448041
12 1758361
13 6960484
14 27766468
15 111490323
16 450177914
17 1827430423
18 7453136569
19 30521419571
20 125469410644
21 517600974331
22 2141983544608
23 8890103668822
24 36997531250241
25 154355482106971
26 645473861118404
27 2705027636972910