OFFSET
0,3
LINKS
Index entries for linear recurrences with constant coefficients, signature (3,-4,6,-4).
FORMULA
From R. J. Mathar, Apr 25 2008: (Start)
G.f.: x*(1-x+2*x^2+2*x^4)/((x-1)*(2*x-1)*(2*x^2+1)).
a(n) = 3*2^(n-2)-(-1)^[(n+1)/2]*A016116(n+1)/6-4/3, n > 1. (End)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Paul Curtz, Apr 01 2008
STATUS
approved