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 A190708 #4 Mar 30 2012 18:57:29 %S A190708 1,5,8,12,16,20,23,27,31,38,42,46,49,53,57,61,64,68,72,76,79,83,87,94, %T A190708 98,102,105,109,113,117,120,124,128,135,139,143,146,150,154,158,161, %U A190708 165,169,173,176,180,184,191,195,199,202,206,210,214,217,221,225,229,232,236,240,247,251,255,258,262,266,270,273,277,281,285,288 %N A190708 Positions of 3 in A190704. %C A190708 See A190704. %t A190708 (See A190704.) %Y A190708 Cf. A190704. %K A190708 nonn %O A190708 1,2 %A A190708 _Clark Kimberling_, May 17 2011