A233725 Number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having the sum of the absolute values of the edge differences equal to 6 and no adjacent elements equal

40, 756, 29816, 2723072, 578163016, 297173770244, 365411698279744, 1098248392267801764, 7928574480658025834472, 139889299008340046298542520

Offset

1,1

Comments

Diagonal of A233733

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Sequence in context: A189286 A160445 A010840 * A175603 A319308 A022073

Adjacent sequences: A233722 A233723 A233724 * A233726 A233727 A233728

Keyword

nonn

Author

R. H. Hardin, Dec 15 2013

Status

approved