# A009770 (b-file synthesized from sequence entry)
0 0
1 1
2 -2
3 5
4 -11
5 -16
6 656
7 -9066
8 107766
9 -1222110
10 13400544
11 -137979810
12 1199045706
13 -4684987308
14 -153270916044
15 6326220565560
16 -169975260810216
17 3943603406845656
18 -83676044951653392
19 1624994111075924376