A185991 - OEIS

A185991

1/128 the number of (n+2)X9 binary arrays with each 3X3 subblock trace equal to some horizontal or vertical neighbor 3X3 subblock trace

%I #5 Mar 31 2012 12:36:04

%S 23840,4038360,333538097,32992227496,3151659956721,306579200951455,

%T 29671205957160911,2878184444421565799,278983544664468587224,

%U 27048807693952318580843,2622411427147271534732564

%N 1/128 the number of (n+2)X9 binary arrays with each 3X3 subblock trace equal to some horizontal or vertical neighbor 3X3 subblock trace

%C Column 7 of A185993

%H R. H. Hardin, <a href="/A185991/b185991.txt">Table of n, a(n) for n = 1..61</a>

%e Some solutions for 4X9

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 08 2011