# A012649 (b-file synthesized from sequence entry)
0 0
1 2
2 -8
3 8
4 2112
5 -199008
6 22569600
7 -3419806080
8 685509888000
9 -177249701752320
10 57657923420313600
11 -23084838758992066560
12 11165823102677176074240
13 -6422018427189941047418880