# A012459 (b-file synthesized from sequence entry)
0 0
1 2
2 -16
3 128
4 9984
5 -1444608
6 105185280
7 11495516160
8 -7997802086400
9 2106956324536320
10 3592879276032000
11 -400446184903952302080
12 271017181684548910448640
13 -56861458491339484126248960