Numbers x,y,z such that UnitarySigma(x) = UnitarySigma(y) = UnitarySigma(z) = 3*(x*y*z)^(1/2)/(- x^(1/2) + 8*y^(1/2) - 5*z^(1/2)), z<=y<=x; sequence gives x.
2, 20, 24, 360, 816, 1056, 12240, 15840, 29120, 181632, 337977, 2724480
2 seqfan posts
Wed Feb 11 16:35:21 CET 2009 [seqfan] Re: A144672