# A012440 (b-file synthesized from sequence entry)
0 0
1 2
2 -4
3 398
4 -10344
5 2050362
6 -188329260
7 60987377670
8 -12776749381200
9 6138167322301170
10 -2341662552659308500
11 1574696831249089102590
12 -954442874464228447345080
13 862598218425468174866650410