# A012222 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 -3
4 -15
5 41
6 561
7 -1243
8 -40415
9 58001
10 4825121
11 -1956083
12 -866056815
13 -740509639
14 218527875281
15 509169335477
16 -73838559553215
17 -295854887910879
18 32207514779999041
19 189240977761969437