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1/4 the number of (n+1) X 5 0..3 arrays with every 2 X 2 subblock having distinct clockwise edge differences.
1

%I #7 Dec 27 2023 00:48:07

%S 8876,614935,40731729,2744311427,183988612894,12365282426546,

%T 830023337140244,55752055566749390,3743494074063656049,

%U 251407614309375778551,16882345627898370229840,1133739174494213238538448

%N 1/4 the number of (n+1) X 5 0..3 arrays with every 2 X 2 subblock having distinct clockwise edge differences.

%C Column 4 of A209716.

%H R. H. Hardin, <a href="/A209712/b209712.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

%Y Cf. A209716.

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 11 2012