A205173 Number of (n+1)X(n+1) 0..3 arrays with the permanents of 2X2 subblocks nondecreasing rightwards and downwards

256, 61320, 73775908, 249458849992, 3735895473961770

Offset

1,1

Comments

Diagonal of A205181

Links

Table of n, a(n) for n=1..5.

Example

Some solutions for n=4
..3..1..3..1..3....3..3..2..3..0....0..2..0..3..0....0..3..3..0..1
..3..3..3..3..3....0..1..2..1..3....2..0..3..1..3....0..0..0..0..1
..3..2..3..2..3....3..3..3..3..1....2..2..2..3..2....1..0..0..3..1
..3..3..3..3..3....0..1..2..1..3....0..3..2..3..2....3..0..1..0..1
..2..3..2..3..3....3..3..3..3..2....2..1..3..3..3....3..0..3..3..2

Crossrefs

Sequence in context: A204302 A264096 A260865 * A205416 A229103 A017572

Adjacent sequences: A205170 A205171 A205172 * A205174 A205175 A205176

Keyword

nonn

Author

R. H. Hardin Jan 22 2012

Status

approved