%I #3 Apr 19 2016 01:10:16

%S 3,45,1512,51408,66528,85500,185976,6323184,8182944,11442816,43023600,

%T 368852400,1407466368,5881607424,22350712320,723437713152,

%U 183348802920960

%N 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 y.

%K nonn

%O 1,1

%A _Yasutoshi Kohmoto_, Feb 21 2009