A183791 - OEIS

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

%S 24329052,67714639662,182672398106924,497350558783784298,

%T 1350253009910264801420,3669246745844998053514738,

%U 9967780407278401322169609464,27081302315719663051228636805358

%N Half the number of (n+1)X9 0..2 arrays with no 2X2 subblock having sum 4

%C Column 8 of A183792

%H R. H. Hardin, <a href="/A183791/b183791.txt">Table of n, a(n) for n = 1..16</a>

%e Some solutions for 3X9

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 07 2011