login
The OEIS is supported by the many generous donors to the OEIS 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 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A188419 Number of (4*n) X n binary arrays with rows in nonincreasing order, four 1's in every column and no more than three 1's in any row. 0
1, 5, 81, 3217, 252493, 33313408, 6720357785, 1943505834628, 768799728447441 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 4 of A188416.

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

All solutions for 8 X 2

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

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

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

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

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

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

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

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

CROSSREFS

Cf. A188416.

Sequence in context: A009733 A009756 A336807 * A009634 A165435 A197443

Adjacent sequences: A188416 A188417 A188418 * A188420 A188421 A188422

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 30 2011

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 November 30 21:57 EST 2022. Contains 358453 sequences. (Running on oeis4.)