# A009337 (b-file synthesized from sequence entry)
0 0
1 1
2 -3
3 7
4 -16
5 40
6 -117
7 411
8 -1720
9 8384
10 -46561
11 289595
12 -1991504
13 14993108
14 -122595085
15 1081616659
16 -10239597968
17 103522029312
18 -1113074512289
19 12681693805203
20 -152613117638712
21 1934275341388596
22 -25753344727083773