A185888 - OEIS

%I #7 May 15 2023 14:38:20

%S 135783240,158165462152,206151739863904,266120814001133510,

%T 341943649302595064930,440856600893036211079732,

%U 568914892688849805876146686,734238018212525212675553891544

%N 1/729 the number of (n+2) X 8 0..2 arrays with no 3 X 3 subblock trace equal to any horizontal or vertical neighbor 3 X 3 subblock trace.

%C Column 6 of A185891.

%H R. H. Hardin, <a href="/A185888/b185888.txt">Table of n, a(n) for n = 1..9</a>

%e Some solutions for 4 X 8

%e ..0..0..0..0..1..2..0..2....0..0..0..0..0..0..1..1....0..0..0..0..1..2..0..0

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

%e ..0..0..0..1..0..2..2..1....0..0..0..1..0..2..2..1....0..0..0..1..0..1..2..0

%e ..0..0..1..0..0..0..0..1....0..0..1..0..0..0..0..0....0..0..1..0..0..0..1..2

%Y Cf. A185891.

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 05 2011