# A009380 (b-file synthesized from sequence entry)
0 0
1 1
2 -1
3 7
4 -26
5 185
6 -1336
7 12367
8 -129296
9 1558865
10 -21045376
11 316097527
12 -5218370816
13 94003171145
14 -1834192393216
15 38543705698687
16 -867785366030336
17 20840298552277025
18 -531767959826169856
19 14366953364916735847