A205518 - OEIS

%I #5 Mar 31 2012 12:37:06

%S 160218,6127554,312856410,15535355076,764670893556,37886453633808,

%T 1873315597879056,92643820648532838,4582814248323919434,

%U 226655621821802013390,11210406172911766981086,554474191273253102643840

%N Number of (n+1)X7 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock differing from each horizontal or vertical neighbor

%C Column 6 of A205520

%H R. H. Hardin, <a href="/A205518/b205518.txt">Table of n, a(n) for n = 1..93</a>

%e Some solutions for n=4

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 28 2012