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

1,1

Comments

Diagonal of A185521

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Sequence in context: A159487 A130661 A187701 * A221444 A185665 A183883

Adjacent sequences: A185509 A185510 A185511 * A185513 A185514 A185515

Keyword

nonn

Author

R. H. Hardin Jan 29 2011

Status

approved