OFFSET
0,5
LINKS
Joshua Zucker, Feb 23 2008, Table of n, a(n) for n = 0..60
Index entries for linear recurrences with constant coefficients, signature (0,2,4).
FORMULA
G.f. x*(-1 + x + x^2) / ( (2*x-1)*(2*x^2 + 2*x + 1) ). - R. J. Mathar, Aug 11 2012
20*a(n) = 2^n - 6*A078069(n), n>0. - R. J. Mathar, Aug 11 2012
CROSSREFS
KEYWORD
sign,easy
AUTHOR
Paul Curtz, Jan 28 2008
EXTENSIONS
More terms from Joshua Zucker, Feb 23 2008
STATUS
approved