# A280115 (b-file synthesized from sequence entry)
1 1
2 3
3 12
4 132
5 792
6 33264
7 266112
8 19958400
9 618710400
10 66820723200
11 801848678400
12 1425686950195200
13 19959617302732800
14 4111681164362956800
15 962133392460931891200
16 1057384598314564148428800
17 19032922769662154671718400
18 112313277263776374717810278400