A187313 - OEIS

%I #5 Mar 31 2012 12:36:08

%S 502545,38586679,2885253967,219684364642,16720419105846,

%T 1272968321737346,96936541525346279,7381886136632779297,

%U 562143290050791907402,42808456214913586706030,3259959385289599256192062

%N Half the number of (n+2)X7 binary arrays with each 3X3 subblock having sum 3, 4, 5 or 6

%C Column 5 of A187317

%H R. H. Hardin, <a href="/A187313/b187313.txt">Table of n, a(n) for n = 1..74</a>

%e Some solutions for 4X7 with a(1,1)=0

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 08 2011