A204348 - OEIS

%I #5 Mar 31 2012 12:37:01

%S 96125591660,919046909794048,8653701637919899728,

%T 81625476908305470240676,769885056390910177755092784,

%U 7261165826937524787547644589200,68484240207050885222667504458844900

%N Number of (n+2)X7 0..3 arrays with no 3X3 subblock having three equal diagonal elements or three equal antidiagonal elements, and new values 0..3 introduced in row major order

%C Column 5 of A204351

%H R. H. Hardin, <a href="/A204348/b204348.txt">Table of n, a(n) for n = 1..8</a>

%e Some solutions for n=3

%e ..0..0..0..1..2..1..1....0..1..1..0..2..0..3....0..0..1..2..1..1..0

%e ..1..2..2..3..1..2..3....0..0..2..1..1..0..2....0..1..0..3..2..1..1

%e ..3..3..0..0..1..2..3....1..0..1..0..2..2..1....0..0..3..1..3..0..2

%e ..1..3..1..2..3..3..1....0..3..1..0..1..0..0....1..0..3..2..0..1..0

%e ..3..1..1..0..2..0..2....0..1..2..0..3..3..0....3..3..1..3..2..2..1

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 14 2012