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