A205234 Number of (n+1)X8 0..2 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing, and all 2X2 permanents nonzero

198325, 76088840, 48815088704, 36382087706267, 28822134156853594

Offset

1,1

Comments

Column 7 of A205235

Links

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

Example

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

Crossrefs

Sequence in context: A344943 A213817 A215996 * A345660 A249358 A290780

Adjacent sequences: A205231 A205232 A205233 * A205235 A205236 A205237

Keyword

nonn

Author

R. H. Hardin Jan 24 2012

Status

approved