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A278805 Number of nX6 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order. 1
28, 672, 20972, 870473, 41299256, 1976588468, 89730161098, 3776527762052, 146582077597322, 5255148833158068, 174697385422916429, 5408652963998274118, 156617481905320805788, 4258375831859896074183, 109105728055490259454053 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A278807.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..48

EXAMPLE

Some solutions for n=3

..1..0..0..0..0..0. .1..1..0..0..0..0. .1..1..1..0..0..0. .1..1..1..0..0..0

..1..2..2..2..0..0. .1..1..2..1..0..0. .2..2..0..1..1..1. .2..0..0..2..1..1

..2..1..1..1..1..1. .2..0..1..0..0..0. .2..2..2..2..0..0. .2..1..1..0..2..0

CROSSREFS

Cf. A278807.

Sequence in context: A309804 A236753 A269473 * A160141 A331476 A239408

Adjacent sequences:  A278802 A278803 A278804 * A278806 A278807 A278808

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 28 2016

STATUS

approved

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Last modified May 28 13:05 EDT 2022. Contains 354115 sequences. (Running on oeis4.)