OFFSET
0,2
LINKS
S. J. Cyvin and I. Gutman, Kekulé structures in benzenoid hydrocarbons, Lecture Notes in Chemistry, No. 46, Springer, New York, 1988 (see p. 210, formula page 204).
Index entries for linear recurrences with constant coefficients, signature (8,-8).
FORMULA
G.f.: -(2*x-1) / (8*x^2-8*x+1). - Colin Barker, Aug 29 2013
MAPLE
A123357 := proc(n)
option remember;
if n <= 1 then
op(n+1, [1, 6]) ;
else
8*(procname(n-1)-procname(n-2)) ;
end if
end proc:
seq( A123357(n), n=0..30) ; # R. J. Mathar, Jul 26 2019
MATHEMATICA
LinearRecurrence[{8, -8}, {1, 6}, 30] (* Jean-François Alcover, Apr 03 2020 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Oct 10 2006
STATUS
approved