# A006673 (b-file synthesized from sequence entry)
0 0
1 1
2 2
3 2
4 -8
5 -56
6 -112
7 848
8 9088
9 25216
10 -310528
11 -4334848
12 -14701568
13 270029824
14 4554426368
15 17536821248
16 -458243735552
17 -8926669144064
18 -37024075153408
19 1341521605885952
20 29290212127670272
21 125297096967061504
22 -6224109737622372352