%N Positive integers a for which there is a primitive (2/3)-Pythagorean triple (a,b,c) satisfying a<=b.
%C See A195770 for definitions of k-Pythagorean triple, primitive k-Pythagorean triple, and lists of related sequences.
%e Primitive (2/3)-Pythagorean triples
%e (c^2=a^2+b^2+k*a*b, where k=2/3):
%t (See A196001.)
%Y Cf. A195770, A196001, A196005, A196006.
%A _Clark Kimberling_, Sep 26 2011