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A196122 Positive integers a for which there is a primitive 4-Pythagorean triple (a,b,c) satisfying a<=b.

%I A196122 #5 Mar 30 2012 18:57:49
%S A196122 3,4,5,7,7,8,9,11,11,12,13,13,15,16,16,17,17,19,19,20,20,20,21,23,23,
%T A196122 24,25,25,28,28,28,29,31,32,32,35,36,37,40,41,43,44,44,44,51,52,52,52,
%U A196122 55,56,57,60,64,65,68,68,69,72,75,76,85,87,88,91,92,93,95
%N A196122 Positive integers a for which there is a primitive 4-Pythagorean triple (a,b,c) satisfying a<=b.
%C A196122 See A195770 for definitions of k-Pythagorean triple, primitive k-Pythagorean triple, and lists of related sequences.
%e A196122 Primitive 4-Pythagorean triples a,b,c;
%e A196122 c^2=a^2+b^2+k*a*b, where k=4:
%e A196122 3,8,13
%e A196122 4,5,11
%e A196122 5,28,37
%e A196122 7,12,23
%e A196122 7,60,73
%e A196122 8,33,47
%e A196122 9,104,121
%e A196122 11,40,59
%e A196122 11,160,181
%e A196122 12,85,107
%t A196122 (See A196119.)
%Y A196122 Cf. A195770, A196119, A196123, A196124.
%K A196122 nonn
%O A196122 1,1
%A A196122 _Clark Kimberling_, Sep 28 2011