cp's OEIS Frontend

A266156 Number of nX2 arrays containing 2 copies of 0..n-1 with no element plus any horizontal, vertical or antidiagonal neighbor equal to n-1.

%I A266156 #5 Aug 12 2016 07:04:21
%S A266156 0,0,0,16,1528,71328,10109856,949116288,197260755456,30713652142080,
%T A266156 8957030720294400,2091857665680783360
%N A266156 Number of nX2 arrays containing 2 copies of 0..n-1 with no element plus any horizontal, vertical or antidiagonal neighbor equal to n-1.
%C A266156 Column 2 of A266158.
%e A266156 Some solutions for n=6
%e A266156 ..0..1....5..5....5..3....0..2....0..1....1..1....0..1....0..4....5..5....3..1
%e A266156 ..2..2....1..1....3..5....4..0....0..3....0..3....2..5....2..2....3..1....0..0
%e A266156 ..5..1....2..2....4..4....4..3....3..1....4..5....4..4....5..1....1..0....2..2
%e A266156 ..3..5....4..0....0..2....5..5....5..5....5..2....2..5....5..1....2..2....4..4
%e A266156 ..3..4....0..3....0..2....2..1....2..4....2..4....1..3....3..0....4..0....5..3
%e A266156 ..4..0....4..3....1..1....1..3....2..4....0..3....0..3....4..3....4..3....1..5
%Y A266156 Cf. A266158.
%K A266156 nonn
%O A266156 1,4
%A A266156 _R. H. Hardin_, Dec 22 2015