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A042861 Denominators of continued fraction convergents to sqrt(962). 3

%I #36 Jan 26 2024 10:20:03

%S 1,62,3845,238452,14787869,917086330,56874140329,3527113786728,

%T 218737928917465,13565278706669558,841266017742430061,

%U 52172058378737333340,3235508885499457097141,200653722959345077356082,12443766332364894253174225,771714166329582788774158032

%N Denominators of continued fraction convergents to sqrt(962).

%C From _Michael A. Allen_, Jan 22 2024: (Start)

%C Also called the 62-metallonacci sequence; the g.f. 1/(1-k*x-x^2) gives the k-metallonacci sequence.

%C a(n) is the number of tilings of an n-board (a board with dimensions n X 1) using unit squares and dominoes (with dimensions 2 X 1) if there are 62 kinds of squares available. (End)

%H Vincenzo Librandi, <a href="/A042861/b042861.txt">Table of n, a(n) for n = 0..200</a>

%H Michael A. Allen and Kenneth Edwards, <a href="https://www.fq.math.ca/Papers1/60-5/allen.pdf">Fence tiling derived identities involving the metallonacci numbers squared or cubed</a>, Fib. Q. 60:5 (2022) 5-17.

%H Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/RecursiveSequences.html">Recursive Sequences</a>

%H <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (62,1).

%F a(n) = F(n, 62), the n-th Fibonacci polynomial evaluated at x=62. - _T. D. Noe_, Jan 19 2006

%F From _Philippe Deléham_, Nov 23 2008: (Start)

%F a(n) = 62*a(n-1) + a(n-2), n>1; a(0)=1, a(1)=62.

%F G.f.: 1/(1 - 62*x - x^2). (End)

%t Denominator[Convergents[Sqrt[962],20]] (* _Harvey P. Dale_, Jun 15 2013 *)

%Y Cf. A042860, A040930.

%Y Row n=62 of A073133, A172236 and A352361 and column k=62 of A157103.

%K nonn,frac,easy

%O 0,2

%A _N. J. A. Sloane_

%E Additional term from _Colin Barker_, Dec 25 2013

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Last modified April 24 06:07 EDT 2024. Contains 371918 sequences. (Running on oeis4.)