A204727 Number of (n+1)X4 0..4 arrays with the permanents of all 2X2 subblocks equal and nonzero.

4772, 44726, 264998, 2122560, 14348560, 108530190, 763490340, 5669180550, 40529890856, 299152763686, 2156365512882, 15887979228428, 115125216329402, 847992795375562, 6168535964532854, 45448892886236444, 331648100487513774

Offset

1,1

Comments

Column 3 of A204732

Links

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

Example

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

Crossrefs

Sequence in context: A031747 A125949 A237214 * A203546 A189183 A237095

Adjacent sequences: A204724 A204725 A204726 * A204728 A204729 A204730

Keyword

nonn

Author

R. H. Hardin, Jan 18 2012

Status

approved