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 A209016 #7 Jul 22 2025 21:34:52 %S A209016 324,172936,92409982,49349902246,26361689168962,14081479775124768, %T A209016 7521858792951566188,4017924265572698697072,2146240525684764881824534, %U A209016 1146449720400141412616571132,612395008605837895502174401436 %N A209016 Number of nX5 0..3 arrays with no element equal the average of immediate neighbors vertically above, diagonally above and left, and horizontally left of it. %C A209016 Column 5 of A209019 %H A209016 R. H. Hardin, <a href="/A209016/b209016.txt">Table of n, a(n) for n = 1..210</a> %e A209016 Some solutions for n=4 %e A209016 ..1..2..1..3..0....2..0..3..0..2....2..3..0..1..2....2..1..2..0..3 %e A209016 ..3..3..0..0..2....0..3..1..1..2....3..2..0..1..2....3..0..2..0..0 %e A209016 ..1..1..3..2..0....1..2..0..1..0....1..1..2..0..2....0..2..3..1..1 %e A209016 ..0..1..0..2..3....3..3..2..2..2....2..3..3..1..2....2..0..1..0..0 %K A209016 nonn %O A209016 1,1 %A A209016 _R. H. Hardin_ Mar 04 2012