A207471 - OEIS

%I #7 Jun 16 2023 15:27:17

%S 42,1764,12994,101233,644401,3205650,16675001,76629370,345252578,

%T 1534975920,6569471819,28198798691,119211939368,501052508853,

%U 2103730122314,8781162264514,36654035342450,152721010610871

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

%C Row 7 of A207467.

%H R. H. Hardin, <a href="/A207471/b207471.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

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

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

%Y Cf. A207467.

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 18 2012