A204739 Number of (n+1)X8 0..1 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing, and all 2X2 permanents nonzero

511, 5219, 50177, 476919, 4484324, 41716355, 384523522, 3504247804, 31566721277, 280920331934, 2471233351768, 21510581598211, 185527816735040, 1588088987381607, 13511723296065256, 114430286873282233

Offset

1,1

Comments

Column 7 of A204740

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A031899 A143036 A160361 * A075948 A011559 A160953

Adjacent sequences: A204736 A204737 A204738 * A204740 A204741 A204742

Keyword

nonn

Author

R. H. Hardin Jan 18 2012

Status

approved