# A013112 (b-file synthesized from sequence entry)
0 1
1 4
2 -8
3 70
4 -920
5 -28550
6 10642900
7 -2554095050
8 685535422000
9 -219648785612750
10 84602550046787500
11 -38917136125065331250
12 21166653214210218325000
13 -13470291608750677967093750