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!)
A254504 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of four medians of central row, central column, diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally 0
512, 12324, 373348, 14550580, 801430034, 70328373238, 8348810077730, 1556719261083451, 442940186438236832, 188746754389519521309 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A254512

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=2

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

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

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

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

CROSSREFS

Sequence in context: A200844 A254475 A254768 * A253812 A256947 A254720

Adjacent sequences: A254501 A254502 A254503 * A254505 A254506 A254507

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 31 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 February 4 19:33 EST 2023. Contains 360059 sequences. (Running on oeis4.)