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%I #11 Jul 18 2023 14:27:05
%S 25,26,181,388,957,3259,4216,41203,45419,86622,218663,305285,3882083,
%T 15833617,19715700,35549317,55265017,90814334,146079351,2428083950,
%U 2574163301,5002247251,7576410552,12578657803
%N Numerators of continued fraction convergents to sqrt(669).
%H Vincenzo Librandi, <a href="/A042286/b042286.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. [_Bruno Berselli_, Nov 22 2013]
%t Numerator[Convergents[Sqrt[669], 30]] (* _Vincenzo Librandi_, Nov 21 2013 *)
%Y Cf. A042287.
%K nonn,cofr,frac,easy
%O 0,1
%A _N. J. A. Sloane_.
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