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 A233391 #8 Feb 23 2014 22:24:30 %S A233391 1482975,2773341207,3600641055375,4673630162187207, %T A233391 6066368350723590975,7874141445609904550007, %U A233391 10220629530033306227969775,13266369255841785874845869607,17219737073453108032244556431775,22351205454972878384067560248226007,2901184746081772268941166095848657697 %N A233391 List of values of d in infinite family of points on Mordell curve x^3-y^2=d over quadratic field Sqrt[13]. %C A233391 All numbers in this sequence are of the form 59319 multipled by an odd number. %F A233391 a(n)=59319(2t[n]-1)where t[n] satisfies the linear recurrence t[n]=1299 t[n-1]-1299 t[n-2] + t[n-2] with t[1]=13, t[2]=23377, t[3]=30349813. %F A233391 (A233379(n))^3-(A233392(n))^2=A233391(n). %Y A233391 Cf. A233379 A233392. %K A233391 nonn %O A233391 1,1 %A A233391 _Artur Jasinski_, Dec 08 2013