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 A042157 Denominators of continued fraction convergents to sqrt(603). 2
 1, 1, 2, 7, 9, 214, 223, 883, 1106, 1989, 96578, 98567, 195145, 684002, 879147, 20904383, 21783530, 86254973, 108038503, 194293476, 9434125351, 9628418827, 19062544178, 66816051361, 85878595539, 2042023748758, 2127902344297, 8425730781649, 10553633125946 (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, 97684, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1). FORMULA G.f.: -(x^18 -x^17 +2*x^16 -7*x^15 +9*x^14 -214*x^13 +223*x^12 -883*x^11 +1106*x^10 -1989*x^9 -1106*x^8 -883*x^7 -223*x^6 -214*x^5 -9*x^4 -7*x^3 -2*x^2 -x -1) / (x^20 -97684*x^10 +1). - Colin Barker, Nov 19 2013 a(n) = 97684*a(n-10) - a(n-20) for n>19. - Vincenzo Librandi, Jan 16 2014 MATHEMATICA Denominator[Convergents[Sqrt[603], 30]] (* Harvey P. Dale, Mar 20 2013 *) CROSSREFS Cf. A042156, A040578. Sequence in context: A042561 A252661 A041453 * A012937 A022414 A319932 Adjacent sequences: A042154 A042155 A042156 * A042158 A042159 A042160 KEYWORD nonn,frac,easy AUTHOR EXTENSIONS More terms from Colin Barker, Nov 19 2013 STATUS approved

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Last modified March 20 18:36 EDT 2023. Contains 361391 sequences. (Running on oeis4.)