A237404 Number of (n+1) X (n+1) 0..2 arrays with the maximum plus the upper median plus the minimum of every 2 X 2 subblock differing from its horizontal and vertical neighbors by exactly one.

81, 1632, 53167, 3604930, 480758688, 101410470742, 36546653191142, 26246859602932048

Offset

1,1

Comments

Diagonal of A237412.

Links

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

Example

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

Crossrefs

Sequence in context: A223279 A096302 A297681 * A237549 A107914 A050634

Adjacent sequences: A237401 A237402 A237403 * A237405 A237406 A237407

Keyword

nonn

Author

R. H. Hardin, Feb 07 2014

Status

approved