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 A152910 #15 Jun 27 2020 09:37:45 %S A152910 1,7,7,17,1,23,31,17,49,47,23,7,71,41,41,7,79,31,97,73,17,127,119,89, %T A152910 47,1,113,161,119,49,73,167,103,23,199,31,161,103,89,223,241,151,191, %U A152910 137,71,79,217,137,17,287,233,287,49,113,119,47,337,281,23,217,193,151,97 %N A152910 Difference between legs of primitive Pythagorean triangles sorted first on hypotenuse, then short leg. %H A152910 M. de Frénicle, <a href="http://gallica.bnf.fr/ark:/12148/bpt6k5493994j/">Méthode pour trouver la solution des problèmes par les exclusions</a>, in: Divers ouvrages de mathématique et de physique par messieurs de l'académie royale des sciences, (1693) pp 1-44, table p 31. %Y A152910 Cf. A058529 (gives range), A120682 (different order). %K A152910 nonn %O A152910 1,2 %A A152910 _Paul Curtz_, Dec 15 2008, Dec 19 2008 %E A152910 Minor edits by _Omar E. Pol_, Jan 06 2009 %E A152910 Edited and extended by _Ray Chandler_, Apr 10 2010