A196949 - OEIS

%I #5 Mar 31 2012 12:36:27

%S 40,6440,393585,33344883,2668162530,215125975535,17331168379114,

%T 1396952062795238,112594151426879227,9074527226180787949,

%U 731362786510896873672,58944855804404539921648,4750716841801426807499533

%N Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,1,0,2,3 for x=0,1,2,3,4

%C Every 0 is next to 0 4's, every 1 is next to 1 1's, every 2 is next to 2 0's, every 3 is next to 3 2's, every 4 is next to 4 3's

%C Column 7 of A196950

%H R. H. Hardin, <a href="/A196949/b196949.txt">Table of n, a(n) for n = 1..38</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Oct 08 2011