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 A264349 #8 Nov 17 2015 19:13:48 %S A264349 5,7,9,217,69,11,199,13,56445,15,6121,46557,17,9567711,127,73829571, %T A264349 19,101080863,21,35927573,1582431,379,23,729,167,32899,689581594497, %U A264349 25,1348157,207495429,1255,27,146613,278601383,29,21751,4777049027,33814353,19022653,5062449,31,43541,225 %N A264349 The x member of the positive proper fundamental solution (x = x1(n), y = y1(n)) of the first class for the Pell equation x^2 - D(n)*y^2 = +8 for odd D(n) = A263012(n). %C A264349 The corresponding y = y1(n) member is given by A264350(n). %C A264349 See A263012 for details and examples. %F A264349 a(n)^2 - D(n)*y1(n)^2 = 8 with D(n) = A263012(n) and y1(n) = A264350(n), n >= 1. %e A264349 n=1: 5^2 - 17*1^2 = 8. n=4: 217^2 - 89*23^2 = 8. %Y A264349 Cf. A263011, A263012, A264350, A264351, A264353. %K A264349 nonn %O A264349 1,1 %A A264349 _Wolfdieter Lang_, Nov 17 2015