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A042279
Denominators of continued fraction convergents to sqrt(665).
2
1, 1, 4, 5, 14, 33, 80, 113, 419, 532, 27019, 27551, 109672, 137223, 384118, 905459, 2195036, 3100495, 11496521, 14597016, 741347321, 755944337, 3009180332, 3765124669, 10539429670, 24843984009, 60227397688, 85071381697, 315441542779, 400512924476
OFFSET
0,3
LINKS
Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 27438, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).
FORMULA
G.f.: -(x^18 -x^17 +4*x^16 -5*x^15 +14*x^14 -33*x^13 +80*x^12 -113*x^11 +419*x^10 -532*x^9 -419*x^8 -113*x^7 -80*x^6 -33*x^5 -14*x^4 -5*x^3 -4*x^2 -x -1) / (x^20 -27438*x^10 +1). - Colin Barker, Dec 06 2013
MAPLE
convert(sqrt(665), confrac, 30, cvgts): denom(cvgts); # Wesley Ivan Hurt, Dec 07 2013
MATHEMATICA
Denominator[Convergents[Sqrt[665], 30]] (* Vincenzo Librandi, Jan 19 2014 *)
CROSSREFS
Sequence in context: A216243 A093862 A041375 * A352683 A182252 A041857
KEYWORD
nonn,frac,easy
AUTHOR
EXTENSIONS
More terms from Colin Barker, Dec 06 2013
STATUS
approved