A210327 1/4 the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having two or three distinct clockwise edge differences

39, 11877, 27838382, 517186072378, 75219268772459800, 85910577682285107137239, 769246866811235591580558612197, 54025101820467333958086011203622611205

Offset

1,1

Comments

Diagonal of A210335

Links

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

Example

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

Crossrefs

Sequence in context: A266453 A279116 A266307 * A174765 A115462 A268072

Adjacent sequences: A210324 A210325 A210326 * A210328 A210329 A210330

Keyword

nonn

Author

R. H. Hardin Mar 20 2012

Status

approved