A185512 Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock singular.

31, 1489, 154561, 80761059, 96865190255, 525819969687473, 7163899183570889649, 401495654334865659721795, 61022067811287778788163474527, 35442207739725827931704064596045201

Offset: 1

Author

R. H. Hardin Jan 29 2011

Keywords

• nonn

Comments

Diagonal of A185521

Examples

			Some solutions for 3X3
..0..1..1....0..0..2....2..1..2....1..0..1....0..0..2....1..0..2....1..0..0
..0..0..0....2..0..2....0..0..0....0..0..1....1..0..2....2..0..0....2..0..2
..2..2..1....2..0..0....0..2..0....1..0..0....1..0..0....2..0..1....2..0..1