A204152 - OEIS

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

%S 23538722,169527242,864266300,4577683574,25275772916,138134688554,

%T 770374556792,4130467300382,22550685062612,121999878097538,

%U 662599450745240,3588969319485734,19369358858520164,104916399180100634

%N Number of (n+2)X9 0..2 arrays with every 3X3 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..2 introduced in row major order

%C Column 7 of A204153

%H R. H. Hardin, <a href="/A204152/b204152.txt">Table of n, a(n) for n = 1..21</a>

%e Some solutions for n=4

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 11 2012