# A012860 (b-file synthesized from sequence entry)
0 0
1 -1
2 1
3 -61
4 17
5 -1021
6 691
7 -32762
8 929569
9 -1045394477
10 221930581
11 -651651769166
12 56963745931
13 -88306000053182
14 2093660879252671
15 -321780490474593819308
16 129848163681107301953
17 -2604961188011595075731
18 209390615747646519456961
19 -7707087027623315087276182
20 16103843159579478297227731