A205272 - OEIS

%I #5 Mar 31 2012 12:37:05

%S 30799890,9173723833,2723625483808,795473851332758,233446295978015247,

%T 68514158629820422369,20100570131126768440800,

%U 5897626069731714817000035,1730408183581457830549108452,507710502684969001154188837839

%N Number of (n+2)X9 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally, and new values 0..1 introduced in row major order

%C Column 7 of A205273

%H R. H. Hardin, <a href="/A205272/b205272.txt">Table of n, a(n) for n = 1..99</a>

%e Some solutions for n=3

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 24 2012