A132380 - OEIS

A132380

Period 8: repeat [0, 0, 1, 1, 0, 0, -1, -1].

0, 0, 1, 1, 0, 0, -1, -1, 0, 0, 1, 1, 0, 0, -1, -1, 0, 0, 1, 1, 0, 0, -1, -1, 0, 0, 1, 1, 0, 0, -1, -1, 0, 0, 1, 1, 0, 0, -1, -1, 0, 0, 1, 1, 0, 0, -1, -1, 0, 0, 1, 1, 0, 0, -1, -1, 0, 0, 1, 1, 0, 0, -1, -1, 0, 0, 1, 1, 0, 0, -1, -1, 0, 0, 1, 1, 0, 0, -1, -1, 0, 0, 1, 1, 0, 0, -1, -1

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,1

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..8191

Index entries for linear recurrences with constant coefficients, signature (0,0,0,-1).

FORMULA

O.g.f.: x^2*(1+x)/(1+x^4). - R. J. Mathar, Apr 06 2008

For n > 0, a(n) = A109247(n)/-3. - Antti Karttunen, Aug 12 2017

a(n) = (1/2)*(1-(-1)^floor(n/2))*(-1)^floor(n/4). - Wesley Ivan Hurt, Aug 31 2019

MATHEMATICA

PadRight[{}, 120, {0, 0, 1, 1, 0, 0, -1, -1}] (* Harvey P. Dale, Mar 17 2016 *)