OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..5000
A. M. Odlyzko, Differences of the partition function, Acta Arithmetica 49.3 (1988): 237-254.
Dennis Stanton and Doron Zeilberger, The Odlyzko conjecture and O’Hara’s unimodality proof, Proceedings of the American Mathematical Society 107.1 (1989): 39-42.
Index entries for linear recurrences with constant coefficients, signature (-6,-20,-49,-98,-169,-259,-359,-455,-531,-573,-573,-531,-455,-359,-259,-169,-98,-49,-20,-6,-1).
FORMULA
An equivalent but more complicated g.f.: 1 / ((1+x)^3*(1-x+x^2)*(1+x^2)*(1+x+x^2)^2*(1+x+x^2+x^3+x^4)*(1+x+x^2+x^3+x^4+x^5+x^6)). - Colin Barker, Aug 10 2016
MATHEMATICA
CoefficientList[Series[1/((1 + x)^3 (1 - x + x^2) (1 + x^2)(1 + x + x^2)^2 (1 + x + x^2 + x^3 + x^4) (1 + x + x^2 + x^3 + x^4 + x^5 + x^6)), {x, 0, 80}], x] (* Vincenzo Librandi, Feb 04 2017 *)
PROG
(PARI) Vec(1/((1+x)^3*(1-x+x^2)*(1+x^2)*(1+x+x^2)^2*(1+x+x^2+x^3+x^4)*(1+x+x^2+x^3+x^4+x^5+x^6)) + O(x^100)) \\ Colin Barker, Aug 11 2016
CROSSREFS
KEYWORD
sign,easy
AUTHOR
N. J. A. Sloane, Aug 09 2016
STATUS
approved