# A012775 (b-file synthesized from sequence entry)
0 0
1 1
2 -1
3 3
4 0
5 -37
6 345
7 -1967
8 2296
9 122093
10 -2157165
11 21241847
12 -62837544
13 -2704412921
14 74329911565
15 -1080320786971
16 5480675823120
17 220652162236409
18 -8577532338045273
19 168598543971458059
20 -1306206271210775920
21 -46736993299592412013