# A224711 (b-file synthesized from sequence entry)
0 1
1 0
2 6
3 6
4 18
5 90
6 150
7 420
8 1890
9 3570
10 10206
11 42966
12 87318
13 252252
14 1019304
15 2172456
16 6319170
17 24810786
18 54712086
19 159906318
20 614406078
21 1390381278
22 4077926034
23 15403838346
24 35579546262
25 104633453340
26 389788932240
27 915500037120
28 2698033909680
29 9934966920960