A204715 Number of (n+1)X(n+1) 0..1 arrays with the permanents of 2X2 subblocks nondecreasing rightwards and downwards

16, 261, 9657, 727255, 118449078, 41246881735, 31109609768113, 51738130203845519, 188875848685544442507, 1543222842240805350432703, 28017029132033699472678460753, 1145483791106793200438759541860992

Offset

1,1

Comments

Diagonal of A204723

Links

R. H. Hardin, Table of n, a(n) for n = 1..13

Example

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

Crossrefs

Sequence in context: A223623 A264532 A240368 * A203841 A301838 A302066

Adjacent sequences: A204712 A204713 A204714 * A204716 A204717 A204718

Keyword

nonn

Author

R. H. Hardin Jan 18 2012

Status

approved