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A195875 Positive integers a for which there is a primitive (-1/2)-Pythagorean triple (a,b,c) satisfying a<=b.

%I A195875 #5 Mar 30 2012 18:57:48
%S A195875 1,5,6,6,7,9,9,10,11,11,13,13,14,14,15,16,16,17,17,19,19,21,22,22,23,
%T A195875 23,26,26,29,31,31,32,32,32,33,34,34,35,37,38,39,41,42,43,46,47,48,48,
%U A195875 48,50,51,54,58,59,62,64,64,64,66,67,70,71,74,75,77,77,79,80,80
%N A195875 Positive integers a for which there is a primitive (-1/2)-Pythagorean triple (a,b,c) satisfying a<=b.
%C A195875 See A195770 for definitions of k-Pythagorean triple, primitive k-Pythagorean triple, and lists of related sequences.
%e A195875 Primitive (-1/2)-Pythagorean triples (a,b,c)
%e A195875 (c^2=a^2+b^2+k*a*b, where k=-1/2):
%e A195875 1,2,2
%e A195875 5,48,47
%e A195875 6,7,8
%e A195875 6,35,34
%e A195875 7,32,31
%e A195875 9,32,31
%e A195875 9,154,152
%e A195875 10,33,32
%e A195875 11,16,17
%t A195875 (See A195872.)
%Y A195875 Cf. A195770, A195872, A195876, A195877.
%K A195875 nonn
%O A195875 1,2
%A A195875 _Clark Kimberling_, Sep 25 2011