A198526 - OEIS

%I #5 Mar 31 2012 12:36:34

%S 202,1948672,26670041125,371815743708461,5186266567454077293,

%T 72341858272434900016248,1009078065869144136137180812,

%U 14075371934477934686865356966591,196333764385468923490801365319931630

%N Number of nX6 0..4 arrays with values 0..4 introduced in row major order and each element equal to no more than two horizontal and vertical neighbors

%C Column 6 of A198528

%H R. H. Hardin, <a href="/A198526/b198526.txt">Table of n, a(n) for n = 1..11</a>

%e Some solutions for n=4

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

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

%e ..0..0..1..0..1..0....0..0..1..0..2..1....0..0..1..0..2..2....0..0..1..0..4..1

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Oct 26 2011