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 A209044 #7 Jul 22 2025 21:36:06 %S A209044 324,143212,64369764,28964458546,13034933066892,5866193355938718, %T A209044 2640002203816927226,1188097914449381928076,534687682738799964386512, %U A209044 240629088538426121775581624,108291924647368035417996430328 %N A209044 Number of nX5 0..3 arrays with no element equal the average of immediate neighbors vertically above and horizontally left of it. %C A209044 Column 5 of A209047 %H A209044 R. H. Hardin, <a href="/A209044/b209044.txt">Table of n, a(n) for n = 1..210</a> %e A209044 Some solutions for n=4 %e A209044 ..0..1..3..0..1....1..0..3..0..3....1..3..2..3..0....2..0..3..0..2 %e A209044 ..1..2..0..2..2....2..2..3..2..2....2..2..1..1..0....0..3..1..1..2 %e A209044 ..2..0..3..2..3....3..2..3..2..3....1..1..2..2..2....1..3..0..1..0 %e A209044 ..0..2..3..3..0....0..2..1..2..1....0..0..3..0..0....3..2..2..1..2 %K A209044 nonn %O A209044 1,1 %A A209044 _R. H. Hardin_ Mar 04 2012