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 A090760 #4 Mar 30 2012 19:01:05 %S A090760 27,49,51,53,89,91,97,101,168,169,181,193,195,240,264 %N A090760 Numbers n which occur exactly three times in A001600. %D A090760 T. Goto and S. Shibata, All numbers whose positive divisors have integral harmonic mean up to 300, Math. Comput. 73 (2004), 475-491. %Y A090760 Cf. A001600, A090240. %K A090760 nonn,more %O A090760 1,1 %A A090760 _R. K. Guy_, Feb 08 2004