login

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

Number of nX5 0..2 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors
1

%I #5 Mar 31 2012 12:36:57

%S 1,63,3748,143936,5660631,231588325,9441977403,385259518988,

%T 15769361994812,645761085331412,26436118387761701,1082201755675241681,

%U 44303475359100889481,1813730483493212443443,74252023311120691422496

%N Number of nX5 0..2 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors

%C Column 5 of A203460

%H R. H. Hardin, <a href="/A203457/b203457.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Jan 02 2012