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 A042839 Denominators of continued fraction convergents to sqrt(950). 2
 1, 1, 5, 6, 11, 17, 28, 45, 118, 163, 281, 444, 725, 1169, 5401, 6570, 399601, 406171, 2024285, 2430456, 4454741, 6885197, 11339938, 18225135, 47790208, 66015343, 113805551, 179820894, 293626445, 473447339, 2187415801, 2660863140 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 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, 0, 0, 0, 0, 0, 0, 0, 0, 405002, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1). FORMULA a(n) = 405002*a(n-16) - a(n-32) for n>31. - Vincenzo Librandi, Jan 30 2014 MATHEMATICA Denominator[Convergents[Sqrt[950], 30]] (* Vincenzo Librandi, Jan 30 2014 *) LinearRecurrence[{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 405002, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, {1, 1, 5, 6, 11, 17, 28, 45, 118, 163, 281, 444, 725, 1169, 5401, 6570, 399601, 406171, 2024285, 2430456, 4454741, 6885197, 11339938, 18225135, 47790208, 66015343, 113805551, 179820894, 293626445, 473447339, 2187415801, 2660863140}, 40] (* Harvey P. Dale, Oct 08 2016 *) PROG (MAGMA) I:=[ /* copy and paste here the first terms up to 2660863140 */ ]; [n le 32 select I[n] else 405002*Self(n-16)-Self(n-32): n in [1..50]]; // Vincenzo Librandi, Jan 30 2014 CROSSREFS Cf. A042838, A040919. Sequence in context: A274283 A022095 A042531 * A041373 A041533 A042881 Adjacent sequences:  A042836 A042837 A042838 * A042840 A042841 A042842 KEYWORD nonn,frac,easy AUTHOR EXTENSIONS More terms from Vincenzo Librandi, Jan 30 2014 STATUS approved

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Last modified January 20 03:32 EST 2019. Contains 319323 sequences. (Running on oeis4.)