login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

Number of (n+2)X(2+2) 0..3 arrays with no increasing sequence of length 3 horizontally, diagonally downwards or vertically
1

%I #4 Dec 11 2013 08:16:38

%S 8254896,1328621536,208066125583,32519299606118,5070020645309648,

%T 790268803855249807,123152447408851785342,19191100654338179315407,

%U 2990528559024374872097052,466009565463506152675878521

%N Number of (n+2)X(2+2) 0..3 arrays with no increasing sequence of length 3 horizontally, diagonally downwards or vertically

%C Column 2 of A233488

%H R. H. Hardin, <a href="/A233484/b233484.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=1

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

%e ..0..3..3..0....0..2..1..2....3..3..3..3....3..2..0..0....3..3..1..1

%e ..1..0..0..1....3..1..0..1....0..2..1..0....3..0..1..0....0..2..0..1

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 11 2013