# A024275 (b-file synthesized from sequence entry)
0 0
1 1
2 -6
3 116
4 -4816
5 342736
6 -37272576
7 5748462656
8 -1193465153536
9 320935235205376
10 -108513125117853696
11 45057835625375568896
12 -22540295648947188269056
13 13370560809273727964041216