OFFSET
1,1
COMMENTS
The original definition "Numbers n such that (n^2-17)/2 is a square" describes A077242. - R. J. Mathar, Nov 27 2011
LINKS
Index entries for linear recurrences with constant coefficients, signature (0,1154,0,-1).
FORMULA
a(n) = 1154*a(n-2) - a(n-4).
MATHEMATICA
Rest[CoefficientList[Series[x (5+215x-1253x^2-23x^3)/((1+34x+x^2)(1-34x+x^2)), {x, 0, 30}], x]] (* or *) LinearRecurrence[{0, 1154, 0, -1}, {5, 215, 4517, 248087}, 30] (* Harvey P. Dale, Apr 04 2014 *)
PROG
(PARI) Vec(x(5+215*x-1253*x^2-23*x^3)/((1+34*x+x^2)*(1-34*x+x^2))+O(x^99)) \\ Charles R Greathouse IV, Sep 26 2012
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Richard Choulet, Sep 21 2008
STATUS
approved