%I A099833
%S A099833 240,360,480,504,630,672,756,780,900,960,990,1020,1092,1140,1170,1188,
%T A099833 1344,1386,1400,1428,1530,1540,1596,1638,1820,1920,1932,1950,2070,2112,
%U A099833 2240,2244,2268,2376,2380,2448,2496,2508,2610,2652,2660,2688,2736,2800
%N A099833 Perimeters of Pythagorean triangles that can be constructed in exactly 
               4 different ways.
%H A099833 Ron Knott, <a href="http://www.mcs.surrey.ac.uk/Personal/R.Knott/Pythag/
               pythag.html">Pythagorean Triples and Online Calculators</a>
%H A099833 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               PythagoreanTriple.html">Pythagorean Triple.</a>
%H A099833 <a href="Sindx_Ps.html#PyTrip">Index entries related to Pythagorean Triples.</
               a>
%e A099833 a(1)=240 = 15+112+113 = 40+96+104 = 48+90+102 = 60+80+100; a(2)=360 = 
               36+160+164 = 60+144+156 = 72+135+153 = 90+120+150.
%Y A099833 Sequence in context: A031173 A067373 A030638 this_sequence A154378 A063372 
               A070123
%Y A099833 Adjacent sequences: A099830 A099831 A099832 this_sequence A099834 A099835 
               A099836
%K A099833 nonn
%O A099833 1,1
%A A099833 Hugo Pfoertner (hugo(AT)pfoertner.org), Oct 27 2004