A052309 Column 1 of triangle A052308.
1, -1, 0, 1, 0, -1, -1, 0, 4, 8, 2, -34, -108, -160, 189, 2363, 8032, 12277, -30155, -347952, -1464609, -3099733, 4975748, 96347901, 539113345, 1751884290, 714138346, -40349734815, -334283308597, -1643012627964, -4159491453450
Offset: 1