# A278679 (b-file synthesized from sequence entry)
2 1
3 5
4 24
5 128
6 770
7 5190
8 38864
9 320704
10 2894544
11 28382800
12 300575968
13 3419882304
14 41612735632
15 539295974000
16 7417120846080
17 107904105986048
18 1655634186628352
19 26721851169634560
20 452587550053179392
21 8026445538106839040
22 148751109541600495104