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A206185 Number of (n+1) X 6 0..3 arrays with every 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors and the same number of counterclockwise edge increases as its vertical neighbors. 1

%I #7 Dec 11 2015 21:28:24

%S 986388,30417316,2674444796,364197868292,51975660472496,

%T 7481908870312588,1078848431799509828,155633082985105845972,

%U 22454117874107278681104,3239703783044424175654576,467432771562040406990065172

%N Number of (n+1) X 6 0..3 arrays with every 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors and the same number of counterclockwise edge increases as its vertical neighbors.

%C Column 5 of A206188.

%H R. H. Hardin, <a href="/A206185/b206185.txt">Table of n, a(n) for n = 1..49</a>

%e Some solutions for n=4:

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 04 2012

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Last modified March 28 13:35 EDT 2024. Contains 371254 sequences. (Running on oeis4.)