OFFSET
1,1
COMMENTS
If n is a member then any n*m^2, m > 1, is too. - Zak Seidov, Sep 01 2014
LINKS
Charles R Greathouse IV, Table of n, a(n) for n = 1..10000
EXAMPLE
30 is a member since the sum of each pair from {6, 19, 30} is square.
PROG
(PARI) is(n)=my(s=sqrtint(2*n-2)); for(A=sqrtint(n)+1, s-1, my(a=A^2-n); for(B=A+1, s, if(issquare(a+B^2-n), return(1)))); 0
CROSSREFS
KEYWORD
nonn
AUTHOR
Charles R Greathouse IV, May 14 2014
STATUS
approved