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 A090759 #5 Mar 30 2012 19:01:05 %S A090759 5,13,15,17,19,24,27,29,37,44,45,46,47,49,51,53,61,73,75,85,86,87,89, %T A090759 91,96,97,99,101,105,107,144,145,149,168,169,171,173,176,181,184,186, %U A090759 187,188,189,191,195,197,203,205,224,240,245,252,264,270,272 %N A090759 Numbers n which occur at least twice in A001600. %D A090759 T. Goto and S. Shibata, All numbers whose positive divisors have integral harmonic mean up to 300, Math. Comput. 73 (2004), 475-491. %Y A090759 Cf. A001600, A090240. %K A090759 nonn %O A090759 1,1 %A A090759 _R. K. Guy_, Feb 08 2004