A251986 - OEIS

%I #4 Dec 12 2014 08:46:08

%S 20011,231559,3069283,43957515,663814741,10354206421,164646337261,

%T 2648489572393,42891326673193,697320655791303,11362478125413003,

%U 185385704533268171,3026933091644568399,49444184724604712255

%N Number of (n+2)X(2+2) 0..2 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 1 or 5

%C Column 2 of A251989

%H R. H. Hardin, <a href="/A251986/b251986.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=1

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 12 2014