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A042033 Denominators of continued fraction convergents to sqrt(540). 2
1, 4, 17, 21, 227, 248, 1219, 5124, 236923, 952816, 4048187, 5001003, 54058217, 59059220, 290295097, 1220239608, 56421317065, 226905507868, 964043348537, 1190948856405, 12873531912587, 14064480768992, 69131454988555, 290590300723212, 13436285288256307 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Index entries for linear recurrences with constant coefficients, signature (0,0,0,0,0,0,0,238142,0,0,0,0,0,0,0,-1).

FORMULA

G.f.: -(x^14 -4*x^13 +17*x^12 -21*x^11 +227*x^10 -248*x^9 +1219*x^8 -5124*x^7 -1219*x^6 -248*x^5 -227*x^4 -21*x^3 -17*x^2 -4*x -1) / ((x^8 -488*x^4 +1)*(x^8 +488*x^4 +1)). - Colin Barker, Nov 29 2013

MATHEMATICA

Denominator[Convergents[Sqrt[540], 30]] (* Vincenzo Librandi, Jan 12 2014 *)

CROSSREFS

Cf. A042032, A040516.

Sequence in context: A193379 A022134 A041529 * A281464 A192197 A009226

Adjacent sequences:  A042030 A042031 A042032 * A042034 A042035 A042036

KEYWORD

nonn,frac,easy

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Colin Barker, Nov 29 2013

STATUS

approved

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Last modified February 20 20:55 EST 2019. Contains 320345 sequences. (Running on oeis4.)