A233092 Number of n X n 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, diagonally or antidiagonally, top left element zero, and 1 appearing before 2 in row major order

1, 11, 941, 342626, 537122150, 3584186808548, 102515478543489824, 12560894457658675727999, 6600737461966058033047530086, 14879494526383664062686710158410323

Offset

1,2

Comments

Diagonal of A233098

Links

R. H. Hardin, Table of n, a(n) for n = 1..11

Example

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

Crossrefs

Sequence in context: A176709 A336800 A083816 * A302374 A243818 A278864

Adjacent sequences: A233089 A233090 A233091 * A233093 A233094 A233095

Keyword

nonn

Author

R. H. Hardin, Dec 04 2013

Status

approved