# A009372 (b-file synthesized from sequence entry)
0 0
1 1
2 -1
3 7
4 -20
5 145
6 -781
7 6711
8 -55040
9 578465
10 -6372241
11 81400295
12 -1118247140
13 17017477425
14 -278763221101
15 4944906503959
16 -93847119338720
17 1903841305391425
18 -41033336868850561
19 937270802152757703