# A012020 (b-file synthesized from sequence entry)
0 1
1 -4
2 76
3 -3256
4 245008
5 -28441216
6 4700478784
7 -1047088053376
8 302112622479616
9 -109527844826856448
10 48716214653800569856
11 -26075068739563056830464
12 16529214537740143196901376