# A002681 (b-file synthesized from sequence entry)
0 1
1 -1
2 1
3 -23
4 263
5 -133787
6 157009
7 -16215071
8 2689453969
9 -26893118531
10 5600751928169
11 -3340626516019229
12 885646796787371
13 -859202038021848149
14 2766671664340938282413
15 -319473088311274492668499
16 436677987276721765221113
17 -191960665849028069896950959123