A233076 Number of n X n 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally or antidiagonally, top left element zero, and 1 appearing before 2 in row major order

1, 14, 1985, 1588262, 6938214854, 165407945648306, 21520525142517911969, 15280137439726087042287674, 59207172638901578439239726940974, 1251961921151721201415260511387809535370

Offset

1,2

Comments

Diagonal of A233082

Links

R. H. Hardin, Table of n, a(n) for n = 1..13

Example

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

Crossrefs

Sequence in context: A160305 A279804 A198601 * A134814 A258487 A206753

Adjacent sequences: A233073 A233074 A233075 * A233077 A233078 A233079

Keyword

nonn

Author

R. H. Hardin, Dec 03 2013

Status

approved