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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A266938 Number of 5Xn binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing. 1
6, 19, 44, 100, 210, 429, 816, 1534, 2727, 4753, 7931, 13044, 20676, 32360, 49327, 73959, 108612, 157751, 224746, 317514, 440564, 606496, 823905, 1110469, 1480403, 1957027, 2563177, 3335398, 4302564, 5520403, 7021711, 8888187, 11173884 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 5 of A266935.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..57

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Cf. A266935.

Sequence in context: A183763 A209403 A272707 * A299265 A005712 A299278

Adjacent sequences:  A266935 A266936 A266937 * A266939 A266940 A266941

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 06 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 5 06:41 EDT 2020. Contains 334828 sequences. (Running on oeis4.)