A278725 Number of n X 6 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order.

84, 10401, 2487889, 815294800, 279368748599, 90462380211862, 26947618206791521, 7361981179311574929, 1850980180963910285369, 430395479744245915185211, 93005966539515246802755901

Offset

1,1

Comments

Column 6 of A278727.

Links

R. H. Hardin, Table of n, a(n) for n = 1..19

Example

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

Crossrefs

Cf. A278727.

Sequence in context: A224022 A283947 A265586 * A186245 A377017 A224429

Adjacent sequences: A278722 A278723 A278724 * A278726 A278727 A278728

Keyword

nonn

Author

R. H. Hardin, Nov 27 2016

Status

approved