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 A184483 #6 Mar 30 2012 18:57:16 %S A184483 3,7,12,16,20,25,29,33,37,42,46,50,55,59,63,68,72,76,80,85,89,93,98, %T A184483 102,106,111,115,119,124,128,132,136,141,145,149,154,158,162,167,171, %U A184483 175,179,184,188,192,197,201,205,210,214,218,222,227,231,235,240,244 %N A184483 Upper s-Wythoff sequence, where s(n)=3n-1. Complement of A184482. %Y A184483 Cf. A184117, A184482. %K A184483 nonn %O A184483 1,1 %A A184483 _Clark Kimberling_, Jan 15 2011