This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A140392 #2 Mar 30 2012 18:52:25 %S A140392 3,8,5,5,24,13,7,48,25,11,120,61,13,168,85,17,288,145,19,360,181,23, %T A140392 528,265,29,840,421,31,960,481,37,1368,685,41,1680,841,43,1848,925,47, %U A140392 2208,1105,53,2808,1405,59,3480,1741,61,3720,1861,67,4488,2245,71,5040,2521 %N A140392 Triples of height (a prime p), base length x and side length y=z of isosceles triangles. %C A140392 Or: consecutive triples of p=A000040(j), x=2*A084920(j), y=z= A066885(j), j>=2. %C A140392 The area of the triangles is half the product of height and base length, p*x/2=A127918(j). %e A140392 Contains (p,x,y) = (3,8,5), (5,24,13), (7,48,25), (11,120,61), ... %K A140392 nonn,less %O A140392 1,1 %A A140392 _Juri-Stepan Gerasimov_, Jun 13 2008 %E A140392 Edited and extended by R. J. Mathar, Jun 17 2008