

A144673


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 y.


4



2, 20, 24, 360, 816, 1056, 12240, 15840, 29120, 181632, 333200, 2724480, 93358848, 1400382720
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OFFSET

1,1


LINKS



EXAMPLE

Factorization of a(11) : 17*5^2*2^4*7^2.


CROSSREFS



KEYWORD

nonn,more


AUTHOR



STATUS

approved



