OFFSET
1,1
COMMENTS
Three times the quadratic average of x,y,z in most cases is greater than their sum.
EXAMPLE
a(7)=33 for 33=1^2+4^2+4^2; floor(sqrt(33/3))=3; 3*3=9=1+4+4.
CROSSREFS
KEYWORD
nonn
AUTHOR
Carmine Suriano, May 05 2014
STATUS
approved