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A253756 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal median minus antidiagonal median nondecreasing horizontally and vertically 0
512, 23096, 1622944, 259418152, 84039781656, 58500640474944, 84156841519162348, 250063157421982076180, 1545740524382351294569364, 19818474670170537027103516398, 527481839143365201432947246654224 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A253764

LINKS

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

EXAMPLE

Some solutions for n=2

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

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

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

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

CROSSREFS

Sequence in context: A264108 A254353 A253793 * A250496 A254160 A254450

Adjacent sequences:  A253753 A253754 A253755 * A253757 A253758 A253759

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 11 2015

STATUS

approved

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Last modified May 16 18:31 EDT 2022. Contains 353720 sequences. (Running on oeis4.)