login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A254450 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal median nondecreasing horizontally and vertically 1
512, 26380, 2085712, 275772848, 71814202464, 37859718002056, 41728495959588032, 96370792918403418032, 471658574277826549969856, 4899488261874299641047185592, 107824890536438862557050692197760 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A254457

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=2

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

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

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

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

CROSSREFS

Sequence in context: A253756 A250496 A254160 * A254484 A253864 A308815

Adjacent sequences:  A254447 A254448 A254449 * A254451 A254452 A254453

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 30 2015

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 August 11 00:55 EDT 2022. Contains 356046 sequences. (Running on oeis4.)