OFFSET
0,2
LINKS
FORMULA
G.f.: (1+6*x)/(1+8*x+6*x^2). a(n)=Sum_{k, 0<=k<=n}A147703(n,k)*(-3)^(n-k).
MATHEMATICA
LinearRecurrence[{-8, -6}, {1, -2}, 30] (* Harvey P. Dale, Apr 03 2015 *)
CROSSREFS
KEYWORD
sign
AUTHOR
Philippe Deléham, Dec 10 2008
STATUS
approved