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 A042287 Denominators of continued fraction convergents to sqrt(669). 2

%I #10 Jul 18 2023 14:28:05

%S 1,1,7,15,37,126,163,1593,1756,3349,8454,11803,150090,612163,762253,

%T 1374416,2136669,3511085,5647754,93875149,99522903,193398052,

%U 292920955,486319007,779239962,3603278855,44018586222,47621865077,139262316376,186884181453

%N Denominators of continued fraction convergents to sqrt(669).

%H Vincenzo Librandi, <a href="/A042287/b042287.txt">Table of n, a(n) for n = 0..200</a>

%H <a href="/index/Rec#order_76">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 28452235718108270, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).

%F a(n) = 28452235718108270*a(n-38) - a(n-76) for n>75. _Vincenzo Librandi_, Jan 19 2014

%t Denominator[Convergents[Sqrt[669], 30]] (* _Vincenzo Librandi_, Jan 19 2014 *)

%Y Cf. A042286.

%K nonn,frac,easy

%O 0,3

%A _N. J. A. Sloane_.

%E More terms from _Vincenzo Librandi_, Jan 19 2014

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Last modified September 12 14:14 EDT 2024. Contains 375851 sequences. (Running on oeis4.)