# A012760 (b-file synthesized from sequence entry)
0 0
1 1
2 -1
3 4
4 -6
5 -7
6 135
7 -968
8 1764
9 58669
10 -1068885
11 10920908
12 -41078730
13 -1105690419
14 31085174939
15 -413045671712
16 692738905320
17 126897371107929
18 -3901725279332361
19 61836650105641300
20 -52537696659319150