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 A042935 #17 Aug 10 2024 21:38:45 %S A042935 1,1,2,3,5,28,173,201,1178,2557,13963,16520,113083,581935,695018, %T A042935 1276953,1971971,3248924,203405259,206654183,410059442,616713625, %U A042935 1026773067,5750578960,35530246827,41280825787 %N A042935 Denominators of continued fraction convergents to sqrt(999). %H A042935 Vincenzo Librandi, <a href="/A042935/b042935.txt">Table of n, a(n) for n = 0..300</a> %H A042935 <a href="/index/Rec#order_36">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, 205377230, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1). %t A042935 Denominator[Convergents[Sqrt[999],30]] (* _Harvey P. Dale_, Aug 15 2013 *) %Y A042935 Cf. A042934. %K A042935 nonn,cofr,frac,easy %O A042935 0,3 %A A042935 _N. J. A. Sloane_