A208077 - OEIS

%I #7 Jun 07 2023 20:11:54

%S 42,1764,30114,514089,10751415,224850025,4412968520,86610135616,

%T 1738407943480,34892708070025,694522498347405,13824134823318561,

%U 276034376753148762,5511735679904794404,109923500301084440190

%N Number of n X 7 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 0 1 0 vertically.

%C Column 7 of A208078.

%H R. H. Hardin, <a href="/A208077/b208077.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

%Y Cf. A208078.

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 23 2012