A207425 - OEIS

%I #5 Mar 31 2012 12:37:17

%S 40,1600,20550,241087,3210938,39698733,474552171,5755114104,

%T 69609375870,836438494500,10061632597765,121113950382680,

%U 1456404024212421,17511407393280395,210603058946646014,2532582001420108242

%N Number of nX7 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 0 1 0 vertically

%C Column 7 of A207426

%H R. H. Hardin, <a href="/A207425/b207425.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 17 2012