A268012 Number of 3Xn 0..n arrays with every repeated value in every row and column unequal to the previous repeated value, and new values introduced in row-major sequential order.

3, 96, 7445, 1396408, 454238345, 231327070236, 169569975455042, 169395686166997667, 221468092160400373173, 367444512792822698032517

Offset

1,1

Comments

Row 3 of A268009.

Links

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

Example

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

Crossrefs

Cf. A268009.

Sequence in context: A300686 A300609 A301351 * A268181 A030262 A107173

Adjacent sequences: A268009 A268010 A268011 * A268013 A268014 A268015

Keyword

nonn

Author

R. H. Hardin, Jan 24 2016

Status

approved