OFFSET
1,5
LINKS
Index entries for linear recurrences with constant coefficients, signature (1,4,-1,-4,1,1).
FORMULA
a(n) = a(n-1)+4*a(n-2)-a(n-3)-4a(n-4)+a(n-5)+a(n-6).
G.f.: -x^3/(x^6+x^5-4*x^4-x^3+4*x^2+x-1). [Colin Barker, Jul 27 2012]
EXAMPLE
MATHEMATICA
(See A192616.)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Jul 09 2011
STATUS
approved