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 A249685 #4 Nov 05 2014 13:18:30 %S A249685 1,2,3,4,6,10,12,18,20,24,30,36,42,54,60,66,72,78,84,90,102,108,114, %T A249685 120,126,138,148,150,156,168,174,180,186,192,198,204,210,222,228,234, %U A249685 240,246,252,260,268,270,282,288,294,300,312,318,324,330,336,342,350,354,360,372,378 %N A249685 Indices where terms of A249684 appear in A084933. %C A249685 A249684 and A249685 are the RECORDS transform of A084933. %H A249685 N. J. A. Sloane, <a href="/transforms.txt">Transforms</a> %Y A249685 Cf. A084933, A084937, A249684. %K A249685 nonn %O A249685 1,2 %A A249685 _N. J. A. Sloane_, Nov 05 2014