A209854 - OEIS

%I #5 Mar 31 2012 12:37:30

%S 9455,661963,45071990,3111914707,213959648565,14741920546390,

%T 1014683000461958,69877891568505574,4810912751472199040,

%U 331268218089091178660,22808554042049077880530,1570485935577042648260737

%N 1/4 the number of (n+1)X5 0..3 arrays with every 2X2 subblock having one or four distinct clockwise edge differences

%C Column 4 of A209858

%H R. H. Hardin, <a href="/A209854/b209854.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 14 2012