# A024285 (b-file synthesized from sequence entry)
0 0
1 1
2 -8
3 144
4 -5184
5 305152
6 -26442752
7 3162378240
8 -498850234368
9 100338708840448
10 -25063296518586368
11 7611477148997517312
12 -2761834207318131081216
13 1180050998603017168617472