First term of n-th difference sequence of (floor(k*r)), r = -sqrt(7), k >= 0.

Terms

a(0) =-3a(1) =0a(2) =1a(3) =-3a(4) =6a(5) =-9a(6) =9a(7) =0a(8) =-27a(9) =81a(10) =-162a(11) =243a(12) =-243a(13) =0a(14) =729a(15) =-2187a(16) =4375a(17) =-6579a(18) =6732a(19) =-1139a(20) =-13719a(21) =32946a(22) =-18921a(23) =-158355a(24) =851598a(25) =-2896919a(26) =8097219a(27) =-20058300a(28) =45540943a(29) =-96506229