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!)
A220146 Number of n X n arrays of the minimum value of corresponding elements and their horizontal or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 n X n array 0
3, 11, 77, 1174, 34959, 3057777, 822242009, 671848868714 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A220153

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A196691 A197064 A117765 * A046153 A163856 A232468

Adjacent sequences:  A220143 A220144 A220145 * A220147 A220148 A220149

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 06 2012

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 February 16 21:46 EST 2020. Contains 331975 sequences. (Running on oeis4.)