OFFSET
1,1
LINKS
Charles R Greathouse IV, Table of n, a(n) for n = 1..10000
EXAMPLE
a(1) = 12 = 2^2 * 3 = 2^2 + 2*2 + 2^2 (x = y = 2).
PROG
(PARI) list(lim)=my(v=List(), y, t); for(x=1, sqrtint(lim\3), my(y=x, t); while((t=x^2+x*y+y^2)<=lim, if(bigomega(t)==3, listput(v, t)); y++)); Set(v) \\ Charles R Greathouse IV, Feb 05 2017
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Jonathan Vos Post, Oct 31 2013
EXTENSIONS
More terms from Michel Marcus, Nov 08 2013
STATUS
approved