OFFSET
0,6
COMMENTS
This g.f. was incorrectly conjectured by Plouffe in his 1992 disseration to be the g.f. for A005377.
LINKS
Simon Plouffe, Approximations de séries génératrices et quelques conjectures, Dissertation, Université du Québec à Montréal, 1992; arXiv:0911.4975 [math.NT], 2009.
Simon Plouffe, 1031 Generating Functions, Appendix to Thesis, Montreal, 1992
Index entries for linear recurrences with constant coefficients, signature (2,-1).
FORMULA
G.f.: z^4*(z^2+1)*(z^4-z^2+1)/(z-1)^2. [Simon Plouffe in his 1992 dissertation.]
a(n) = 2*(n-6), n>=9. - R. J. Mathar, Jun 09 2016
a(n) = A004279(n-4) for n >= 4. - Georg Fischer, Oct 30 2018
MATHEMATICA
CoefficientList[Series[(x^4+x^10)/(1-2x+x^2), {x, 0, 120}], x] (* Harvey P. Dale, Sep 10 2018 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Sean A. Irvine, Jun 07 2016
STATUS
approved