%I A020883
%S A020883 4,12,15,21,24,35,40,45,55,56,60,63,72,77,80,84,91,99,105,112,117,120,
%T A020883 132,140,143,144,153,156,165,168,171,176,180,187,195,208,209,220,221,224,
%U A020883 231,240,247,252,253,255,260,264,272,273,275,285,288,299,304,308,312,323
%N A020883 Ordered long legs of primitive Pythagorean triangles.
%C A020883 Consider primitive Pythagorean triangles (A^2 + B^2 = C^2, (A, B) = 1, 
               A <= B); sequence gives values of B, sorted.
%H A020883 Ron Knott, <a href="http://www.mcs.surrey.ac.uk/Personal/R.Knott/Pythag/
               pythag.html">Pythagorean Triples and Online Calculators</a>
%t A020883 lst={}; amx=99; Do[For[b=a+1, b<(a^2/2), c=(a^2+b^2)^(1/2); If[c==IntegerPart[c]&&GCD[a, 
               b, c]==1, AppendTo[lst, b]]; b=b+2], {a, 3, amx}]; lst [From Vladimir 
               Orlovsky (4vladimir(AT)gmail.com), Aug 07 2008]
%Y A020883 Cf. A024354.
%Y A020883 Cf. A020882, A020884-A020886.
%Y A020883 Sequence in context: A103020 A024353 A024354 this_sequence A002365 A046087 
               A081872
%Y A020883 Adjacent sequences: A020880 A020881 A020882 this_sequence A020884 A020885 
               A020886
%K A020883 nonn
%O A020883 0,1
%A A020883 Clark Kimberling (ck6(AT)evansville.edu)
%E A020883 Extended and corrected by David W. Wilson (davidwwilson(AT)comcast.net)