# A122892 (b-file synthesized from sequence entry)
4 1
5 10
6 70
7 424
8 2382
9 12804
10 66946
11 343772
12 1744314
13 8780912
14 43976688
15 219546976
16 1094132461
17 5448766458
18 27135655714
19 135218356264
20 674461583180
21 3368432133000
22 16847360404260
23 84396523333080
24 423485559461250