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 A144949 #3 Apr 19 2016 01:10:16 %S A144949 3,45,1512,51408,66528,85500,185976,6323184,8182944,11442816,43023600, %T A144949 318041100,1407466368,5881607424,22350712320,723437713152, %U A144949 183348802920960 %N A144949 Consider numbers x,y,z such that UnitarySigma(x) = UnitarySigma(y) = UnitarySigma(z) = 4*(x*y*z)^(1/2)/( x^(1/2) + y^(1/2) + z^(1/2)), x<=y<=z . Sequence gives x . %C A144949 a(6) : x=y, y<z %C A144949 a(11) : x=y, y<z %C A144949 a(12) : x<y, y=z %K A144949 nonn %O A144949 1,1 %A A144949 _Yasutoshi Kohmoto_, Feb 21 2009