A112081 A112080(n)/2.
0, 1, -1, 0, 2, 0, 4, -1, 0, 0, 0, 6, -3, 0, 6, 0, 1, -1, 0, -3, 0, 9, -3, 0, 0, 0, 1, -3, 0, -2, 0, 1, -1, 0, 9, 0, 1, -1, 0, 12, 0, 3, -1, 0, 0, 0, 3, -4, 0, 2, 0, 1, -1, 0, -3, 0, 16, -3, 0, 0, 0, 1, -3, 0, -5, 0, 1, -1, 0, 14, 0, 1, -1, 0, 2, 0, 19, -1, 0, 0, 0, 3, -3, 0, 2, 0, 1, -1, 0
Offset: 1