A205902 Number of (n+1)X(n+1) 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock the same

81, 2943, 327501, 103275303, 87381878025, 193311671549253, 1103442692933402073, 16171078560726954322707, 607154926010685736292686917

Offset

1,1

Comments

Diagonal of A205909

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Sequence in context: A253741 A253516 A038398 * A295252 A295651 A143652

Adjacent sequences: A205899 A205900 A205901 * A205903 A205904 A205905

Keyword

nonn

Author

R. H. Hardin Feb 01 2012

Status

approved