OFFSET
0,3
LINKS
Index entries for linear recurrences with constant coefficients, signature (1,1,1,2).
FORMULA
O.g.f.: -x(1+2x+3x^2)/((2x-1)(1+x)(x^2+1)). a(n) = (-1)^(n+1)/3 +11*2^n/15 -2*(-1)^[n/2]*A000034(n)/5 . - R. J. Mathar, May 24 2008
MATHEMATICA
LinearRecurrence[{1, 1, 1, 2}, {0, 1, 3, 7}, 35] (* Harvey P. Dale, Apr 20 2011 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Paul Curtz, May 23 2008
EXTENSIONS
More terms from R. J. Mathar, May 24 2008
STATUS
approved