A252774 - OEIS

%I #4 Dec 21 2014 12:07:54

%S 22295,121043,797340,6142118,51149836,451291764,4182615816,

%T 39449312353,381282828301,3767301056971,37191447134596,

%U 371622619688928,3754163562212629,37678459964979454,380924738976282695

%N Number of (n+2)X(4+2) 0..3 arrays with every consecutive three elements in every row, column and nw-se diagonal having exactly two distinct values, and new values 0 upwards introduced in row major order

%C Column 4 of A252777

%H R. H. Hardin, <a href="/A252774/b252774.txt">Table of n, a(n) for n = 1..27</a>

%e Some solutions for n=2

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 21 2014