A205089 Number of (n+1)X(n+1) 0..3 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock equal to the number in all its horizontal and vertical neighbors

256, 13116, 4251766, 6997750028, 56016870922512, 2198408614173601972, 426069670428664499911552, 408397032103596887991434131888, 1937279907224716538436705741462507484

Offset

1,1

Comments

Diagonal of A205097

Links

R. H. Hardin, Table of n, a(n) for n = 1..10

Example

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

Crossrefs

Sequence in context: A224967 A205652 A284032 * A239443 A240932 A238073

Adjacent sequences: A205086 A205087 A205088 * A205090 A205091 A205092

Keyword

nonn

Author

R. H. Hardin Jan 22 2012

Status

approved