# A012777 (b-file synthesized from sequence entry)
0 0
1 1
2 -1
3 7
4 -24
5 223
6 -1635
7 19409
8 -221592
9 3270325
10 -50128965
11 898512371
12 -17140184688
13 364328185843
14 -8275583884295
15 204221077642685
16 -5369189766162960
17 151121003206989833
18 -4508710182336979593