%I #5 Mar 31 2012 12:36:07
%S 201495,97400287,22237406277,6014794685157,1557834542977401,
%T 411931941306416847,108124495560461502429,28454687244738848695377,
%U 7482086662398565239408367,1967930140348277322040712515
%N 1/729 the number of (n+2)X7 0..2 arrays with each 3X3 subblock trace equal to some horizontal or vertical neighbor 3X3 subblock trace
%C Column 5 of A186962
%H R. H. Hardin, <a href="/A186958/b186958.txt">Table of n, a(n) for n = 1..19</a>
%e Some solutions for 4X7
%e ..0..0..1..1..0..0..1....0..0..1..1..2..0..2....0..0..1..0..2..0..0
%e ..0..0..0..2..2..2..1....0..0..0..1..1..0..0....0..0..0..1..2..2..2
%e ..0..0..0..0..0..0..1....0..0..0..0..0..0..1....0..0..0..0..1..1..1
%e ..0..0..0..0..0..0..0....0..0..0..0..0..1..2....0..0..0..0..0..1..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 01 2011