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 A146196 #7 Dec 18 2015 18:17:14 %S A146196 0,540,24646,108226,315281,734060,1477489,2682776,4511681,7150588, %T A146196 10810505,15727064,22160521,30395756,40742273,53534200,69130289, %U A146196 87913916,110293081 %N A146196 Number of n X n arrays of squares of integers with every (n-3)X(n-3) subblock summing to 5 and every element equal to at least one neighbor. %F A146196 Empirical (for n>=10): a(n) = 1026*n^4 - 20236*n^3 + 152815*n^2 - 529236*n + 720920. - _Vaclav Kotesovec_, Nov 30 2012 %K A146196 nonn %O A146196 5,2 %A A146196 _R. H. Hardin_ Apr 14 2009