A205044 Number of (n+1)X7 0..6 arrays with the permanents of all 2X2 subblocks equal and nonzero.

1451748, 271619224, 2700120030, 585016930830, 6109962465816, 1394914737725462, 15032648681652406

Offset

1,1

Comments

Column 6 of A205046

Links

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

Example

Some solutions for n=4
..1..3..3..4..5..4..3....3..5..2..2..2..5..4....2..5..2..1..0..1..5
..5..3..3..2..2..2..3....2..0..2..3..2..0..2....0..1..0..1..2..0..2
..1..3..3..4..5..4..3....3..5..0..5..0..5..6....2..6..2..1..0..1..4
..5..3..3..2..2..2..3....2..0..2..1..2..0..2....0..1..0..1..2..0..2
..1..3..3..4..5..4..3....1..5..4..3..4..5..0....2..0..2..0..2..1..0

Crossrefs

Sequence in context: A364783 A003932 A364782 * A237314 A263071 A204801

Adjacent sequences: A205041 A205042 A205043 * A205045 A205046 A205047

Keyword

nonn

Author

R. H. Hardin, Jan 21 2012

Status

approved