This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A041312 #30 Dec 26 2023 07:42:16 %S A041312 13,339,8827,229841,5984693,155831859,4057613027,105653770561, %T A041312 2751055647613,71633100608499,1865211671468587,48567136558791761, %U A041312 1264610762200054373,32928446953760205459,857404231559965396307,22325438467512860509441,581318804386894338641773 %N A041312 Numerators of continued fraction convergents to sqrt(170). %H A041312 Vincenzo Librandi, <a href="/A041312/b041312.txt">Table of n, a(n) for n = 0..200</a> %H A041312 Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/RecursiveSequences.html">Recursive Sequences</a> %H A041312 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (26,1). %F A041312 From _Philippe Deléham_, Nov 21 2008: (Start) %F A041312 a(n) = 26*a(n-1) + a(n-2) for n > 1, a(0)=13, a(1)=339. %F A041312 G.f.: (13+x)/(1-26*x-x^2). (End) %t A041312 Numerator[Convergents[Sqrt[170], 30]] (* _Vincenzo Librandi_, Nov 01 2013 *) %Y A041312 Cf. A041313. %K A041312 nonn,cofr,frac,easy %O A041312 0,1 %A A041312 _N. J. A. Sloane_ %E A041312 More terms from _Colin Barker_, Nov 06 2013