A205233 Number of (n+1) X 7 0..2 arrays with rows and columns of permanents of all 2 X 2 subblocks lexicographically nondecreasing, and all 2 X 2 permanents nonzero.

58892, 11675764, 3408343704, 1029060698687, 315651250338121

Offset

1,1

Comments

Column 6 of A205235.

Links

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

Example

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

Crossrefs

Cf. A205235.

Sequence in context: A214118 A157131 A217603 * A235953 A343374 A359310

Adjacent sequences: A205230 A205231 A205232 * A205234 A205235 A205236

Keyword

nonn

Author

R. H. Hardin, Jan 24 2012

Status

approved