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 A112398 #7 Jan 21 2020 13:42:53 %S A112398 3,7,9,11,19,23,27,31,33,39,43,47,49,51,57,59,67,69,71,75,79,81,83,87, %T A112398 93,95,103,107,111,115,119,121,123,127,129,131,133,135,139,141,147, %U A112398 151,155,159,161,163,167,175,177,179,183,189,191,199,201,203,207,211,213 %N A112398 Odd numbers which are exclusively the shortest side of primitive Pythagorean triangles. %C A112398 Numbers that are in A081874 (odd short legs) but in neither A081934 (odd long legs) nor A020882 (hypotenuse). %H A112398 Ray Chandler, <a href="/A112398/b112398.txt">Table of n, a(n) for n = 1..10000</a> %Y A112398 Entries of A112372 excluding entries in A020882. %K A112398 nonn %O A112398 1,1 %A A112398 _Lekraj Beedassy_, Dec 06 2005 %E A112398 Extended by _Ray Chandler_, Dec 08 2005