# A149654 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 15
4 75
5 275
6 1375
7 5601
8 28005
9 121089
10 605445
11 2715677
12 13578385
13 62402157
14 312010785
15 1458538087
16 7292690435
17 34518363331
18 172591816655
19 824661140195
20 4123305700975
21 19846014090155
22 99230070450775
23 480374578408091
24 2401872892040455
25 11681652878375315
26 58408264391876575
27 285150381706792519