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%I #12 Mar 19 2017 09:08:00
%S 1,1,4,21,25,71,522,593,11789,12382,98463,209308,307771,1748163,
%T 5552260,7300423,297569180,304869603,1212177989,6365759548,7577937537,
%U 21521634622,158229379891,179751014513,3573498655638,3753249670151,29846246346695,63445742363541
%N Denominators of continued fraction convergents to sqrt(431).
%H Harvey P. Dale, <a href="/A041821/b041821.txt">Table of n, a(n) for n = 0..1000</a>
%H <a href="/index/Rec#order_32">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, 303121440, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).
%F a7n) = 303121440*a(n-16)- a(n-32) for n>31. - _Vincenzo Librandi_, Dec 25 2013
%t Denominator[Convergents[Sqrt[431],50]] (* _Harvey P. Dale_, Jun 04 2012 *)
%Y Cf. A041820.
%K nonn,frac,easy
%O 0,3
%A _N. J. A. Sloane_.
%E More terms from _Vincenzo Librandi_, Dec 25 2013
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