A205199 Number of (n+1)X(n+1) 0..2 arrays with the permanents of 2X2 subblocks nondecreasing rightwards and downwards

81, 6138, 1649549, 1099532113, 2353566223899, 13538086185801579, 239515966345579392136

Offset

1,1

Comments

Diagonal of A205206

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Sequence in context: A212706 A036354 A205887 * A250612 A228974 A178513

Adjacent sequences: A205196 A205197 A205198 * A205200 A205201 A205202

Keyword

nonn

Author

R. H. Hardin Jan 23 2012

Status

approved