A206247 Number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having zero permanent

49, 8029, 1364224, 4556324929, 14139111560401, 848170637644693504, 48673249000646115009649, 50198078741005740094898080285, 52964434709981480280861081128206336

Offset

1,1

Comments

Diagonal of A206255

Links

R. H. Hardin, Table of n, a(n) for n = 1..17

Example

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

Crossrefs

Sequence in context: A006692 A304313 A283788 * A180273 A351598 A014801

Adjacent sequences: A206244 A206245 A206246 * A206248 A206249 A206250

Keyword

nonn

Author

R. H. Hardin Feb 05 2012

Status

approved