OFFSET
0,3
LINKS
Index entries for linear recurrences with constant coefficients, signature (-1,2,-2,2).
FORMULA
a(n) = -a(n-1) + 2 a(n-2) - 2 a(n-3) + 2 a(n-4) - N-E. Fahssi, Mar 29 2008
a(n) -a(n-1) = (-1)^(n+1)*A052912(n). - R. J. Mathar, Jul 08 2022
CROSSREFS
KEYWORD
sign,easy
AUTHOR
N. J. A. Sloane, Nov 17 2002
STATUS
approved