# A012508 (b-file synthesized from sequence entry)
0 1
1 -1
2 25
3 -1105
4 91313
5 -12232385
6 2400320393
7 -649247356433
8 231544408317537
9 -105271075840787713
10 59429582363323624185
11 -40787189186519841731153
12 33444147237661076070865681