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A195990 Positive integers a for which there is a primitive (1/3)-Pythagorean triple (a,b,c) satisfying a<=b.

%I A195990 #6 Mar 30 2012 18:57:49
%S A195990 3,5,5,7,8,8,9,9,11,11,13,16,17,19,19,21,23,27,27,27,29,31,31,32,32,
%T A195990 33,37,37,39,41,43,45,45,48,48,51,51,56,57,61,63,63,63,64,67,69,72,72,
%U A195990 72,72,73,75,77,79,80,80,81,85,87,88,88,96,97,99,99,99,104,115
%N A195990 Positive integers a for which there is a primitive (1/3)-Pythagorean triple (a,b,c) satisfying a<=b.
%C A195990 See A195770 for definitions of k-Pythagorean triple, primitive k-Pythagorean triple, and lists of related sequences.
%e A195990 Primitive (1/3)-Pythagorean triples
%e A195990 (c^2=a^2+b^2+k*a*b, where k=1/3):
%e A195990 3,8,9
%e A195990 5,9,11
%e A195990 5,72,73
%e A195990 7,27,29
%e A195990 8,9,13
%e A195990 8,45,47
%e A195990 9,13,17
%e A195990 9,77,79
%e A195990 11,48,51
%e A195990 11,351,353
%t A195990 (See A195939.)
%Y A195990 Cf. A195770, A195939, A195991, A195992.
%K A195990 nonn
%O A195990 1,1
%A A195990 _Clark Kimberling_, Sep 26 2011