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 A109231 #14 Feb 16 2025 08:32:58 %S A109231 1,3,4,6,7,9,10,12,13,15,16,18,20,21,23,24,26,27,29,30,32,33,35,37,38, %T A109231 40,41,43,44,46,47,49,50,52,54,55,57,58,60,61,63,64,66,67,69,70,72,74, %U A109231 75,77,78,80,81,83,84,86,87,89,91,92,94,95,97,98,100 %N A109231 a(n) = floor(n*cosh(1)). %C A109231 Beatty sequence for cosh(1) = (e+1/e)/2 = 1.54308...= A073743; complement of A109232. %H A109231 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HyperbolicCosine.html">Hyperbolic Cosine</a> %H A109231 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/BeattySequence.html">Beatty Sequence</a> %H A109231 <a href="/index/Be#Beatty">Index entries for sequences related to Beatty sequences</a> %Y A109231 Cf. A073743, A109232, A109233, A109234, A109237, A059563. %K A109231 nonn %O A109231 1,2 %A A109231 _Reinhard Zumkeller_, Jun 23 2005