A041771 - OEIS

%I #14 Jul 17 2023 00:46:09

%S 1,6,7,20,87,629,716,3493,4209,32956,136033,305022,441055,2951352,

%T 118495135,713922162,832417297,2378756756,10347444321,74810867003,

%U 85158311324,415444112299,500602423623,3919661077660,16179246734263,36278154546186

%N Denominators of continued fraction convergents to sqrt(406).

%H Vincenzo Librandi, <a href="/A041771/b041771.txt">Table of n, a(n) for n = 0..200</a>

%H <a href="/index/Rec#order_28">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 118936190, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).

%F a(n) = 118936190*a(n-14) - a(n-28) for n>27, - _Vincenzo Librandi_, Dec 24 2013

%t Denominator[Convergents[Sqrt[406], 30]] (* _Harvey P. Dale_, Sep 15 2011 *)

%Y Cf. A041770.

%K nonn,frac,easy

%O 0,2

%A _N. J. A. Sloane_.

%E More terms from _Vincenzo Librandi_, Dec 24 2013