# A024277 (b-file synthesized from sequence entry)
0 0
1 1
2 -6
3 176
4 -8176
5 691456
6 -86186496
7 15358324736
8 -3667315849216
9 1135407181398016
10 -441731548179726336
11 211079248633366839296
12 -121507103129359646457856
13 82940335057202543199256576