OFFSET
1,1
COMMENTS
Numbers n such that the Diophantine equation x^2+y^2+z^2 = x*y*z = n can be solved.
A list of x′s in nondecreasing order over all solutions of x^2+y^2+z^2 = x*y*z, with x >= y >= z.
x,y,z is a solution of x^2+y^2+z^2 = 3x*y*z if and only if 3x,3y,3z is a solution of x^2+y^2+z^2 = x*y*z.
EXAMPLE
a(1)=1,a(2)=6,a(3)=15, for (3,3,3), (6,3,3) and (15,6,3) are solutions of x^2+y^2+z^2=x*y*z.
CROSSREFS
KEYWORD
nonn
AUTHOR
Antoine Verroken (antoine.verroken(AT)pandora.be), Aug 27 2003
STATUS
approved