A205416 Number of (n+1)X(n+1) 0..3 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock differing from the number in all its horizontal and vertical neighbors

256, 62716, 74565586, 399249906572, 9958775794360374

Offset

1,1

Comments

Diagonal of A205422

Links

Table of n, a(n) for n=1..5.

Example

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

Crossrefs

Sequence in context: A264096 A260865 A205173 * A229103 A017572 A189270

Adjacent sequences: A205413 A205414 A205415 * A205417 A205418 A205419

Keyword

nonn

Author

R. H. Hardin Jan 27 2012

Status

approved