login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A278804 Number of nX5 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order. 1
21, 336, 5767, 110455, 2179956, 41299256, 725674326, 11698232451, 172994405326, 2356249442222, 29713542257399, 348752692539813, 3828597575581476, 39486426123589674, 384123325152744838, 3537191225894230125 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A278807.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..109

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A278807.

Sequence in context: A036224 A113895 A062260 * A166914 A020311 A295350

Adjacent sequences:  A278801 A278802 A278803 * A278805 A278806 A278807

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 28 2016

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 24 12:01 EDT 2022. Contains 354033 sequences. (Running on oeis4.)