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 A083000 #5 Oct 19 2017 03:14:15 %S A083000 3,18,338,2883,24642,486098,4155987,35532450,700951682,5992929075, %T A083000 51237766962 %N A083000 Values of x for which 9y^2 = x^2 + 2xy - 2x has integer solutions with positive y. %C A083000 From the x and y values, one can derive some z's such that 10z^2-9 is a square (A052454): z = x+y-1. Other A052454 values can be derived from A046195. %Y A083000 Cf. A046195, A052454. %K A083000 nonn %O A083000 1,1 %A A083000 _Jon Perry_, May 30 2003 %E A083000 Edited by _Don Reble_, Nov 07 2005