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 A196336 #7 Jun 02 2025 04:23:02 %S A196336 17,123,744,14973,169152,1783508,20775275,288083607,3804352736, %T A196336 45025949276,551749790508,6938656473356,86871212883112, %U A196336 1084929546742079,13732256293307465,172093176937103403,2135921380879622460 %N A196336 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,0,3,1,2 for x=0,1,2,3,4. %C A196336 Every 0 is next to 0 4's, every 1 is next to 1 0's, every 2 is next to 2 3's, every 3 is next to 3 1's, every 4 is next to 4 2's %C A196336 Column 7 of A196337 %H A196336 R. H. Hardin, <a href="/A196336/b196336.txt">Table of n, a(n) for n = 1..127</a> %e A196336 Some solutions for n=4 %e A196336 ..1..0..1..1..3..1..0....0..1..3..1..1..0..0....0..0..0..0..0..0..0 %e A196336 ..3..1..1..0..1..1..0....0..1..1..0..1..1..1....1..3..1..1..3..1..1 %e A196336 ..1..3..1..0..1..1..0....0..1..1..0..3..1..3....3..1..3..3..1..1..3 %e A196336 ..0..0..1..1..3..1..0....0..1..3..1..1..0..1....1..0..1..1..0..0..1 %K A196336 nonn %O A196336 1,1 %A A196336 _R. H. Hardin_ Oct 01 2011