A184558 - OEIS

%I #5 Mar 31 2012 12:36:00

%S 2167,91157,3436266,134840527,5228522011,203570564774,7915660174974,

%T 307926979784837,11976979258313503,465872448754593695,

%U 18120917050387510050,704848019543121767190,27416378429106168358674

%N Number of (n+1)X4 0..2 arrays with no 2X2 subblock summing to less than 4

%C Column 3 of A184564

%H R. H. Hardin, <a href="/A184558/b184558.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for 3X4

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 17 2011