# A142703 (b-file synthesized from sequence entry)
1 1
2 1
3 8
4 54
5 496
6 5500
7 71952
8 1084328
9 18500480
10 352526544
11 7420540480
12 171007474528
13 4282272360192
14 115785275702720
15 3361891345761536
16 104330298643927680
17 3446150079670054912
18 120716332862675408128