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A196172 Positive integers a for which there is a primitive 7-Pythagorean triple (a,b,c) satisfying a<=b.

%I A196172 #5 Mar 30 2012 18:57:49
%S A196172 1,1,3,3,5,5,5,7,7,7,7,7,8,8,8,8,9,9,11,11,11,11,13,13,13,13,16,16,16,
%T A196172 16,17,17,17,17,19,19,19,19,21,23,23,23,24,24,25,29,29,31,31,32,32,32,
%U A196172 32,33,35,37,39,40,40,41,43,45
%N A196172 Positive integers a for which there is a primitive 7-Pythagorean triple (a,b,c) satisfying a<=b.
%C A196172 See A195770 for definitions of k-Pythagorean triple, primitive k-Pythagorean triple, and lists of related sequences.
%e A196172 Primitive 7-Pythagorean triples a,b,c;
%e A196172 c^2=a^2+b^2+7a*b:
%e A196172 1,1,3
%e A196172 1,8,11
%e A196172 3,11,19
%e A196172 3,91,101
%e A196172 5,16,29
%e A196172 5,77,93
%e A196172 5,264,281
%e A196172 7,16,33
%e A196172 7,39,59
%e A196172 7,87,109
%t A196172 (See A196169.)
%Y A196172 Cf. A195770, A196169, A196173, A196174.
%K A196172 nonn
%O A196172 1,3
%A A196172 _Clark Kimberling_, Sep 29 2011