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 A184514 #5 Mar 30 2012 18:57:16 %S A184514 1,2,3,5,6,7,8,10,11,12,13,15,16,17,18,19,21,22,23,24,26,27,28,29,31, %T A184514 32,33,34,36,37,38,39,40,42,43,44,45,47,48,49,50,52,53,54,55,57,58,59, %U A184514 60,61,63,64,65,66,68,69,70,71,73,74,75,76,78,79,80,81,83,84,85,86,87,89,90,91,92,94,95,96,97,99,100,101,102,104,105,106,107,108,110,111,112,113,115,116,117,118,120,121,122,123,125,126,127,128,129,131,132,133,134,136,137,138,139,141,142,143,144,146,147,148 %N A184514 Lower s-Wythoff sequence, where s(n)=4n-1. Complement of A184515. %C A184514 See A184117 for the definition of lower and upper s-Wythoff sequences. %t A184514 k=4; r=1; d=Sqrt[4+k^2]; %t A184514 a[n_]:=Floor[(1/2)(d+2-k)(n+r/(d+2))]; %t A184514 b[n_]:=Floor[(1/2)(d+2+k)(n-r/(d+2))]; %t A184514 Table[a[n],{n,120}] %t A184514 Table[b[n],{n,120}] %Y A184514 Cf. A184117, A184515. %K A184514 nonn %O A184514 1,2 %A A184514 _Clark Kimberling_, Jan 16 2011