# A267141 (b-file synthesized from sequence entry)
10 6
11 66
12 792
13 10296
14 144144
15 2162160
16 34594560
17 588107520
18 10585935360
19 201132771840
20 4022655436800
21 84475764172800
22 1858466811801600
23 42744736671436800
24 1025873680114483200
25 25646842002862080000
26 666817892074414080000