A196981 - OEIS

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

%S 9,803,31386,1272373,53216978,2188092870,90401915964,3740738215983,

%T 154705956361411,6393070820268590,264219149718966451,

%U 10923404535101323602,451574917966470461834,18666476210321258568728

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

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

%C Column 7 of A196982

%H R. H. Hardin, <a href="/A196981/b196981.txt">Table of n, a(n) for n = 1..186</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Oct 08 2011