|
%I #5 Mar 31 2012 12:37:30
%S 68201,10137464,1460712837,213959648565,31192434742293,
%T 4558499131132306,665390868679472699,97186568439693174719,
%U 14190270163904001178515,2072301261390366075837054,302603111366297145304112118
%N 1/4 the number of (n+1)X6 0..3 arrays with every 2X2 subblock having one or four distinct clockwise edge differences
%C Column 5 of A209858
%H R. H. Hardin, <a href="/A209855/b209855.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..3..2..0..1..2..0....1..0..0..1..0..2....2..2..1..2..0..1....1..1..2..1..2..0
%e ..3..0..1..3..1..2....3..2..3..1..3..3....3..0..2..0..1..3....0..3..1..3..1..2
%e ..0..1..3..2..3..1....3..0..1..0..0..1....1..3..2..3..3..2....2..0..3..0..3..1
%e ..3..3..0..0..0..3....2..3..1..3..2..0....3..0..3..1..0..2....2..3..1..3..1..2
%e ..0..1..3..1..3..2....2..0..0..0..3..0....1..0..1..0..3..3....3..0..0..0..3..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 14 2012
| 