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 A041740 Numerators of continued fraction convergents to sqrt(390). 2
 19, 20, 59, 79, 3061, 3140, 9341, 12481, 483619, 496100, 1475819, 1971919, 76408741, 78380660, 233170061, 311550721, 12072097459, 12383648180, 36839393819, 49223041999, 1907314989781, 1956538031780, 5820391053341, 7776929085121, 301343696287939 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..200 Index entries for linear recurrences with constant coefficients, signature (0,0,0,158,0,0,0,-1). FORMULA G.f.: -(x^7-19*x^6+20*x^5-59*x^4-79*x^3-59*x^2-20*x-19) / (x^8-158*x^4+1). - Colin Barker, Nov 11 2013 MATHEMATICA Numerator[Convergents[Sqrt[390], 30]] (* Vincenzo Librandi, Nov 07 2013 *) LinearRecurrence[{0, 0, 0, 158, 0, 0, 0, -1}, {19, 20, 59, 79, 3061, 3140, 9341, 12481}, 30] (* Harvey P. Dale, May 01 2021 *) CROSSREFS Cf. A041741. Sequence in context: A041724 A041722 A041738 * A041736 A041734 A041744 Adjacent sequences: A041737 A041738 A041739 * A041741 A041742 A041743 KEYWORD nonn,cofr,frac,easy AUTHOR N. J. A. Sloane. EXTENSIONS More terms from Colin Barker, Nov 11 2013 STATUS approved

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Last modified September 19 14:43 EDT 2024. Contains 376013 sequences. (Running on oeis4.)