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 A130227 #6 Aug 19 2015 20:39:55 %S A130227 1,1,1,1,5,1,1,13,1,5,1,25,13,3805,1,125,5,1,41,53,569,1,389,851525, %T A130227 73,1,61,5,149,1,9305,385645,1,85,82596761,5,126985,1,221,17,1,113, %U A130227 1517,4574225,281 %N A130227 Smallest integer y satisfying the Pell equation x^2-ny^2=-1 for the values of n given in A031396. %H A130227 Ray Chandler, <a href="/A130227/b130227.txt">Table of n, a(n) for n = 1..10000</a> %Y A130227 Cf. A031396, A130226. %K A130227 nonn %O A130227 1,5 %A A130227 _Colin Barker_, Aug 05 2007