A196365 - OEIS

%I #5 Mar 30 2012 18:57:49

%S 2,3,5,7,7,10,10,11,11,13,14,15,15,16,16,16,17,18,19,19,22,23,23,25,

%T 26,26,27,29,31,32,32,32,34,34,35,35,35,37,38,39,41,42,43,46,47,48,48,

%U 50,51,55,55,55,58,59,62,63,64,64,64,65,66,67,70,71,74,75,77,79

%N Positive integers a for which there is a primitive (-5/2)-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 (-5/2)-Pythagorean triples a,b,c;

%e c^2=a^2+b^2-(5/2)*a*b:

%e 2,5,2

%e 3,14,10

%e 5,16,9

%e 7,16,5

%e 7,64,55

%e 10,21,4

%e 10,69,56

%e 11,30,14

%e 11,150,136

%e 13,80,63

%t (See A196362.)

%Y Cf. A195770, A196362, A196366, A196367.

%K nonn

%O 1,1

%A _Clark Kimberling_, Oct 01 2011