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A196681 Number of n X 4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,0,1,2,3 for x=0,1,2,3,4.

%I A196681 #7 Apr 21 2021 12:43:46
%S A196681 5,61,292,2245,15395,109528,796557,5702355,40479328,289195575,
%T A196681 2074543871,14876511544,106491873717,761738952927,5453371319038,
%U A196681 39065425553179,279802106777205,2003379491308618,14343725864416775,102713433223681069
%N A196681 Number of n X 4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,0,1,2,3 for x=0,1,2,3,4.
%C A196681 Every 0 is next to 0 4's, every 1 is next to 1 0's, every 2 is next to 2 1's, every 3 is next to 3 2's, every 4 is next to 4 3's.
%C A196681 Column 4 of A196685.
%H A196681 R. H. Hardin, <a href="/A196681/b196681.txt">Table of n, a(n) for n = 1..200</a>
%e A196681 Some solutions for n=5
%e A196681 ..0..2..1..2....1..0..0..1....1..1..0..0....0..0..1..2....0..0..1..1
%e A196681 ..1..1..0..1....1..0..0..1....0..1..2..0....0..0..1..1....1..1..1..0
%e A196681 ..2..2..0..1....2..0..2..1....1..1..1..1....1..1..2..0....1..1..1..2
%e A196681 ..1..1..0..1....1..2..1..0....1..0..0..1....2..1..0..0....0..0..0..1
%e A196681 ..0..2..1..2....0..0..1..1....2..1..1..2....0..2..1..1....1..1..1..2
%Y A196681 Cf. A196685.
%K A196681 nonn
%O A196681 1,1
%A A196681 _R. H. Hardin_ Oct 05 2011