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A254012 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally 0
512, 7212, 89310, 1016249, 3486340, 12820652, 45398628, 102538840, 261881432, 773696684, 1940850378, 4904675739, 13916479182, 35276177013 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A254020

LINKS

Table of n, a(n) for n=1..14.

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A253833 A017487 A263034 * A258518 A222775 A257419

Adjacent sequences:  A254009 A254010 A254011 * A254013 A254014 A254015

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 22 2015

STATUS

approved

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Last modified January 24 19:34 EST 2022. Contains 350565 sequences. (Running on oeis4.)