A204724 Number of (n+1)X(n+1) 0..4 arrays with the permanents of all 2X2 subblocks equal and nonzero

544, 12744, 264998, 45026614, 3884003062, 3923500974342, 1379568377068438

Offset

1,1

Comments

Diagonal of A204732

Links

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

Example

Some solutions for n=4
..1..0..1..2..0....3..4..1..4..3....1..2..4..0..4....3..1..3..1..1
..4..4..0..4..2....1..2..2..2..1....4..0..4..2..2....2..1..2..1..4
..0..1..1..2..0....3..4..1..4..3....1..2..4..0..4....3..1..3..1..1
..4..2..2..0..2....1..2..2..2..1....3..2..0..2..1....2..1..2..1..4
..0..1..1..2..0....3..4..1..4..3....4..0..4..4..2....3..1..3..1..1

Crossrefs

Sequence in context: A204732 A204725 A266136 * A168564 A223376 A022048

Adjacent sequences: A204721 A204722 A204723 * A204725 A204726 A204727

Keyword

nonn

Author

R. H. Hardin Jan 18 2012

Status

approved