A237966 Number of (n+1)X(n+1) 0..3 arrays with the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one

256, 10014, 369068, 25087700, 3450339192, 713207137992, 276807823136806, 191404026313142728, 237221109913547184542

Offset

1,1

Comments

Diagonal of A237974

Links

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

Example

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

Crossrefs

Sequence in context: A016960 A224393 A224026 * A205936 A264496 A224967

Adjacent sequences: A237963 A237964 A237965 * A237967 A237968 A237969

Keyword

nonn

Author

R. H. Hardin, Feb 16 2014

Status

approved