OFFSET
1,1
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
Index entries for linear recurrences with constant coefficients, signature (0,9).
FORMULA
a(n) = 8*9^floor((n-1)/2).
G.f.: 8*x*(1+x)/(1-9*x^2). a(n) = 8*3^(n-2)*(2-(-1)^n). - Bruno Berselli, Oct 24 2011
MATHEMATICA
Table[8 9^Floor[(n-1)/2], {n, 50}] (* Harvey P. Dale, Oct 21 2011 *)
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
Martin Renner, May 02 2006
EXTENSIONS
More terms from Harvey P. Dale, Oct 21 2011
STATUS
approved