A209812 - OEIS

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

%S 29782,2377378,201392025,18479672376,1723218327331,163050586738067,

%T 15504605303759031,1479750086026160266,141469984114652971017,

%U 13541106121228119997018,1296999869113669232283019

%N Number of (n+1)X7 0..3 arrays with every 2X2 subblock having two distinct values, and new values 0..3 introduced in row major order

%C Column 6 of A209814

%H R. H. Hardin, <a href="/A209812/b209812.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 13 2012