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 A105823 #2 Mar 30 2012 17:26:14 %S A105823 16,49,121,144,400,256,529,576,529,784,625,1849,2116,2601,1089,2704, %T A105823 2209,4096,2704,3600,4761,6084,4624,1764,2601,2809,7396,11025,10404, %U A105823 7056,3364,3481,4489,15876,14161,21904,6241,9025,10404,19881,11236 %N A105823 Perfect squares in A105822. %F A105823 a(n)=A105822(n+1)^2+4*A105822(n)*A105822(n+2) %Y A105823 Cf. A105822. %K A105823 nonn %O A105823 1,1 %A A105823 _Zak Seidov_, Apr 22 2005