# A009790 (b-file synthesized from sequence entry)
0 0
1 1
2 -1
3 -1
4 12
5 -44
6 0
7 1308
8 -9744
9 10252
10 627300
11 -8602012
12 52192272
13 175312944
14 -7344669696
15 47605119248
16 1147983841920
17 -39804749006384
18 654853807745712
19 -6275619074963280
20 23531625959609280
21 -369751741237644224