OFFSET
0,2
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (-1, 56).
FORMULA
a(n) = 56*a(n-2)-a(n-1), a(0)= 1, a(1)= -7, for n>1.
G.f.: (1-6*x)/(1+x-56*x^2).
a(n) = Sum_{k=0..n} A112555(n,k)*(-8)^k.
E.g.f.: (1/15)*(exp(7*x) + 14*exp(-8*x)). - G. C. Greubel, May 01 2016
MATHEMATICA
LinearRecurrence[{-1, 56}, {1, -7}, 50] (* G. C. Greubel, May 01 2016 *)
CROSSREFS
KEYWORD
easy,sign
AUTHOR
Philippe Deléham, Oct 08 2009
STATUS
approved