OFFSET
1,2
LINKS
Indranil Ghosh, Table of n, a(n) for n = 1..502
R. Flórez, R. A. Higuita, and A. Mukherjee, Alternating Sums in the Hosoya Polynomial Triangle, Article 14.9.5 Journal of Integer Sequences, Vol. 17 (2014).
Index entries for linear recurrences with constant coefficients, signature (98,-1).
FORMULA
a(n) = ((49+20*sqrt(6))^n - (49-20*sqrt(6))^n)/(40*sqrt(6)).
G.f.: x/(1-98*x+x^2). - R. J. Mathar, Feb 13 2010
MATHEMATICA
CoefficientList[Series[x/(1-98x+x^2), {x, 0, 20}], x] (* Harvey P. Dale, Mar 13 2011 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Sture Sjöstedt, Feb 12 2010
EXTENSIONS
More terms from R. J. Mathar, Feb 13 2010
Definition rewritten (with Mathar's recurrence) by Bruno Berselli, Nov 10 2011
STATUS
approved