OFFSET
0,2
COMMENTS
Also, values i where A067060(i)/i reaches a new maximum (conjectured).
LINKS
E. I. Emerson, Recurrent Sequences in the Equation DQ^2=R^2+N, Fib. Quart., 7 (1969), pp. 231-242.
Index entries for linear recurrences with constant coefficients, signature (0,6,0,-1)
FORMULA
MATHEMATICA
CoefficientList[Series[(1+6x+17x^2-x^3-3x^4)/(1-6x^2+x^4), {x, 0, 40}], x] (* or *) LinearRecurrence[{0, 6, 0, -1}, {1, 6, 23, 35, 134}, 40] (* Harvey P. Dale, Jun 12 2021 *)
PROG
(PARI) a(n)=polcoeff((-3*x^4-x^3+17*x^2+6*x+1)/(x^4-6*x^2+1)+O(x^100), n)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Ralf Stephan, Sep 23 2013
STATUS
approved