login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A250575 Number of (n+1) X (n+1) 0..1 arrays with nondecreasing max(x(i,j),x(i,j-1)) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction 1
10, 60, 336, 1776, 8914, 43202, 203560, 939730, 4266332, 19120668, 84774066, 372587962, 1625370614, 7046239064, 30380655534, 130376624746, 557189663232, 2372600434880, 10070044493366, 42616195500252, 179877106083440 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A250583

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..28

EXAMPLE

Some solutions for n=6

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A293081 A292489 A083585 * A155633 A002493 A054364

Adjacent sequences:  A250572 A250573 A250574 * A250576 A250577 A250578

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 25 2014

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified January 20 17:28 EST 2018. Contains 297960 sequences.