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A254252 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the diagonal and antidiagonal minus the sum of the minimums of the central row and column nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1
512, 14681, 268900, 2983064, 35691048, 325742026, 3756830312, 53130567141, 538163662362, 8068163879144, 153117743133240, 1493329979839859, 22285849665127808, 1767418588341588795, 9961527956307703614 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A254260

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..25

EXAMPLE

Some solutions for n=2

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

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

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

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

CROSSREFS

Sequence in context: A253812 A256947 A254720 * A200791 A254812 A329894

Adjacent sequences:  A254249 A254250 A254251 * A254253 A254254 A254255

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 27 2015

STATUS

approved

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Last modified October 18 12:19 EDT 2021. Contains 348067 sequences. (Running on oeis4.)