# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a204626 Showing 1-1 of 1 %I A204626 #5 Mar 31 2012 12:37:02 %S A204626 6144,933462,141832254,21550390395,3274427479938,497525810748759, %T A204626 75595484720747496,11486192649538372653,1745244733464500021670, %U A204626 265177441526573391694167,40291813604266663731304284 %N A204626 Number of (n+1)X5 0..2 arrays with every 2X2 subblock having unequal diagonal elements or unequal antidiagonal elements, and new values 0..2 introduced in row major order %C A204626 Column 4 of A204630 %H A204626 R. H. Hardin, Table of n, a(n) for n = 1..210 %F A204626 Empirical: a(n) = 165*a(n-1) -2025*a(n-2) +6241*a(n-3) -270*a(n-4) -17282*a(n-5) +5524*a(n-6) +11864*a(n-7) +1568*a(n-8) %e A204626 Some solutions for n=3 %e A204626 ..0..0..0..1..2....0..0..0..0..0....0..1..0..2..1....0..0..0..0..1 %e A204626 ..0..1..2..0..2....1..0..1..1..2....1..1..2..1..1....0..1..0..2..1 %e A204626 ..2..0..2..2..1....2..2..1..2..2....2..1..1..1..0....0..0..2..1..0 %e A204626 ..1..2..1..2..1....2..1..0..1..1....1..0..2..1..2....0..2..1..0..2 %K A204626 nonn %O A204626 1,1 %A A204626 _R. H. Hardin_ Jan 17 2012 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE