%I #5 Jun 26 2017 16:01:32
%S 4,12,15,24,40,21,35,60,63,84,45,112,56,99,144,55,77,80,180,143,220,
%T 72,117,91,195,264,140,312,255,165,105,364,176,132,323,420,221,120,
%U 480,187,153,168,399,260,544,285
%N Middle side (or long leg) of primitive Pythagorean triangle corresponding to hypotenuse A121727.
%C Complete triple (X,Y,Z), with X>Y>Z, is given by X=A121727(n),Y=a(n),Z=A121729(n).
%K nonn
%O 1,1
%A _Lekraj Beedassy_, Aug 17 2006
%E a(43)=399 inserted by _Ray Chandler_, Jun 26 2017