login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A229777 Number of 5X5 0..n arrays with rows in lexicographically nondecreasing order and columns in nonincreasing order 1
252, 2179956, 3062815568, 843211336888, 81937334158292, 3896490956821414, 110102810429666544, 2093314279759590565, 29136130649614970102, 315228320642171324718, 2770642691605055402356, 20456013945849864263232 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 5 of A229774

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..17

EXAMPLE

Some solutions for n=1

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

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

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

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

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

CROSSREFS

Sequence in context: A172557 A068275 A068287 * A083957 A172656 A172760

Adjacent sequences:  A229774 A229775 A229776 * A229778 A229779 A229780

KEYWORD

nonn

AUTHOR

R. H. Hardin, Sep 29 2013

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 30 22:59 EST 2021. Contains 349426 sequences. (Running on oeis4.)