A206077 Number of (n+1)X(n+1) 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock equal to one

124, 13672, 4379116, 3974151636, 9872088702792, 66942855421767116, 1235464317731532811636, 62111169401391445609577832

Offset

1,1

Comments

Diagonal of A206085

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Sequence in context: A293084 A289299 A035816 * A097842 A206189 A299828

Adjacent sequences: A206074 A206075 A206076 * A206078 A206079 A206080

Keyword

nonn

Author

R. H. Hardin Feb 03 2012

Status

approved