A237464 Number of (n+1) X (n+1) 0..2 arrays with the maximum plus the lower median minus the upper median of every 2 X 2 subblock differing from its horizontal and vertical neighbors by exactly one.

81, 2308, 143780, 21134116, 6781496755, 4700362341374, 7302593738902292, 26735744862459553294, 211398124707561970968488

Offset

1,1

Comments

Diagonal of A237472.

Links

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

Example

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

Crossrefs

Cf. A237472.

Sequence in context: A253399 A236820 A370229 * A233023 A236989 A038676

Adjacent sequences: A237461 A237462 A237463 * A237465 A237466 A237467

Keyword

nonn

Author

R. H. Hardin, Feb 08 2014

Status

approved