A049268 - OEIS

%I #4 Mar 30 2012 18:35:39

%S 0,2,3,0,5,6,7,8,0,1,2,3,1,5,6,0,8,9,10,11,3,7,11,15,0,9,18,7,5,21,22,

%T 23,24,25,26,0,1,2,3,4,5,6,7,8,9,7,11,12,0,9,15,4,9,18,19,20,3,1,11,

%U 15,1,23,27,0,9,18,7,32,15,31,11,36,1,9,39,19,17,42,43,44,0,1,2,3,1,2,6,7

%N Smallest nonnegative value taken on by nx^2 - 9y^2 for an infinite number of integer pairs (x, y).

%K nonn

%O 1,2

%A _David W. Wilson_