A267977 Number of 3Xn 0..3 arrays with every repeated value in every row greater than or equal to, and in every column greater than, the previous repeated value.

60, 3600, 216000, 12067722, 648144348, 33600202086, 1691726672094, 83078866656672, 3993019853352132, 188338933978296900, 8737015871231173194, 399355062781386269430, 18013039522804400997948, 802791844156171633174662

Offset

1,1

Comments

Row 3 of A267974.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Cf. A267974.

Sequence in context: A053401 A375666 A267930 * A159991 A042741 A166772

Adjacent sequences: A267974 A267975 A267976 * A267978 A267979 A267980

Keyword

nonn

Author

R. H. Hardin, Jan 23 2016

Status

approved