A252884 - OEIS

%I #4 Dec 24 2014 09:06:26

%S 3102,25227,206314,1723377,14424475,120914908,1013935410,8505529697,

%T 71356949001,598708221110,5023496674281,42151375927194,

%U 353688236912557,2967792166328957,24902779030429194,208960087817293157

%N Number of (2+2)X(n+2) 0..2 arrays with every consecutive three elements in every row having 2 or 3 distinct values, in every column 1 or 2 distinct values, in every diagonal 2 distinct values, and in every antidiagonal 2 distinct values, and new values 0 upwards introduced in row major order

%C Row 2 of A252882

%H R. H. Hardin, <a href="/A252884/b252884.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 24 2014