A268106 Number of 3Xn 0..n arrays with every repeated value in every row and column greater than or equal to the previous repeated value.

8, 729, 262144, 232608375, 427979206656, 1422917069386176, 7780188517552009728, 65282814314072669856303, 797471492064362985335311000, 13607369559752757079941998010377

Offset

1,1

Comments

Row 3 of A268103.

Links

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

Example

Some solutions for n=5
..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0
..0..0..4..1..5....0..0..5..0..5....0..0..5..1..3....0..0..3..2..1
..0..3..2..5..4....0..3..4..0..0....3..3..5..1..2....0..3..4..3..0

Crossrefs

Cf. A268103.

Sequence in context: A220641 A017007 A268250 * A023813 A068895 A115590

Adjacent sequences: A268103 A268104 A268105 * A268107 A268108 A268109

Keyword

nonn

Author

R. H. Hardin, Jan 26 2016

Status

approved