A204868 Number of (n+1)X(n+1) 0..3 arrays with the permanents of all 2X2 subblocks equal and nonzero

207, 3167, 53311, 4256141, 282748327, 94493071327, 24583374827519, 34898804015036761, 36258417235170928699

Offset

1,1

Comments

Diagonal of A204876

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Sequence in context: A217297 A205198 A205194 * A223650 A232346 A052093

Adjacent sequences: A204865 A204866 A204867 * A204869 A204870 A204871

Keyword

nonn

Author

R. H. Hardin Jan 20 2012

Status

approved