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 A261248 #5 Sep 08 2015 04:32:26 %S A261248 1,1,1,1,7,1,23,1,1,7,1,151,1,47,1,193,1,3383,7,1,217,1,9041,17,1,7, %T A261248 161,1,23,20687,1,119,233,1,437071,617,1,7199,20783,7,17,137,1,593,1, %U A261248 497,731153,1839433,79,1,326471,7,2863 %N A261248 Positive fundamental solution y(n) of the generalized Pell equation X^2 - D(n) Y(n) = 2 with D(n) = A261246(n). %C A261248 For the corresponding positive fundamental solution x(n) see A261247(n). %C A261248 [x(n), y(n)] gives the positive proper fundamental solution for D(n) = A261246(n), for n >= 1. %C A261248 See the comments on A261246 for this generalized Pell equation. %e A261248 See A261246. %Y A261248 Cf. A261246, A261247. %K A261248 nonn %O A261248 1,5 %A A261248 _Wolfdieter Lang_, Sep 06 2015