A183799 - OEIS

%I #5 Mar 31 2012 12:35:54

%S 22152262,124651925557,696376467061670,3896032216049375462,

%T 21790300291942204212420,121880956287359200992546463,

%U 681711632433215037867828560638,3813006321741956987579568546477519

%N 1/4 the number of (n+1)X7 0..3 arrays with no 2X2 subblock having sum 6

%C Column 6 of A183802

%H R. H. Hardin, <a href="/A183799/b183799.txt">Table of n, a(n) for n = 1..17</a>

%e Some solutions for 3X7

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 07 2011