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 A196335 #7 Jun 02 2025 04:22:56 %S A196335 12,62,259,3246,25295,237905,1783508,14742650,131257701,1161104389, %T A196335 9477920113,79981857183,698216221745,5973531188672,50458097968498, %U A196335 431717763820004,3722514631710593,31795825068196111,270678277789108068 %N A196335 Number of nX6 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 A196335 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 A196335 Column 6 of A196337 %H A196335 R. H. Hardin, <a href="/A196335/b196335.txt">Table of n, a(n) for n = 1..200</a> %e A196335 Some solutions for n=4 %e A196335 ..1..0..0..0..0..0....1..0..0..0..1..1....0..1..1..0..0..1....0..1..1..1..0..0 %e A196335 ..3..1..1..1..1..1....1..1..1..1..1..0....0..1..3..1..3..1....1..1..0..3..1..1 %e A196335 ..1..1..3..1..1..1....0..1..1..3..1..1....0..1..3..1..1..0....1..3..0..1..3..1 %e A196335 ..0..0..0..0..0..0....1..1..0..0..0..1....1..3..1..0..1..1....0..1..1..1..0..0 %K A196335 nonn %O A196335 1,1 %A A196335 _R. H. Hardin_ Oct 01 2011