A205927 Number of (n+1)X(n+1) 0..3 arrays with the number of clockwise edge increases in 2X2 subblocks nondecreasing rightwards and downwards

256, 95888, 164649752, 1235093642064, 40748437316237404, 5953229517409280684864

Offset

1,1

Comments

Diagonal of A205935

Links

Table of n, a(n) for n=1..6.

Example

Some solutions for n=4
..1..0..3..3..3....0..0..1..1..1....3..2..2..0..1....3..0..1..1..1
..2..2..2..2..2....1..2..0..3..2....2..0..3..1..2....1..2..0..3..2
..3..2..3..3..1....0..0..3..2..1....1..1..0..2..3....1..3..1..0..3
..1..2..1..0..2....2..1..0..3..2....3..2..1..0..2....3..0..2..1..0
..1..3..2..1..3....3..2..1..0..3....2..1..2..1..0....1..1..3..2..1

Crossrefs

Sequence in context: A264347 A223199 A207295 * A223354 A236941 A222141

Adjacent sequences: A205924 A205925 A205926 * A205928 A205929 A205930

Keyword

nonn

Author

R. H. Hardin Feb 01 2012

Status

approved