A209708 1/4 the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having distinct clockwise edge differences

24, 2710, 1277340, 2744311427, 26024000948100, 1105092894348108870, 208427296314737259382008, 175434641568425738606430293927

Offset

1,1

Comments

Diagonal of A209716

Links

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

Example

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

Crossrefs

Sequence in context: A217971 A296652 A092706 * A266870 A277003 A060902

Adjacent sequences: A209705 A209706 A209707 * A209709 A209710 A209711

Keyword

nonn

Author

R. H. Hardin Mar 11 2012

Status

approved