# A002683 (b-file synthesized from sequence entry)
0 1
1 -7
2 37
3 -199
4 40321
5 -5512813
6 136601407
7 -32373535937
8 4039314145093
9 -377880467185583
10 123905113265594071
11 -53834048464836263969
12 66351862106782030159
13 -194322297839115779164331
14 149128127842572749235559291
15 -25454412383565669030714950177