A269478 Number of n X 3 arrays containing 3 copies of 0..n-1 avoiding the pattern down-up in every row and equal-up in every column.

1, 14, 574, 36028, 3572724, 548242672, 121353398100

Offset

1,2

Comments

Column 3 of A269479.

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Cf. A269479.

Sequence in context: A166185 A361695 A349766 * A269645 A232369 A218412

Adjacent sequences: A269475 A269476 A269477 * A269479 A269480 A269481

Keyword

nonn

Author

R. H. Hardin, Feb 27 2016

Status

approved