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A253954 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal median minus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1
512, 20868, 1501724, 240903042, 77993064012, 54401550145686, 78151552269875720, 232106691536153580818, 1434896543229609953653472, 18395963378201546364490900139, 489591524753759022642241209084588 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A253961

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..12

EXAMPLE

Some solutions for n=2

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

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

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

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

CROSSREFS

Sequence in context: A186831 A236215 A254182 * A264108 A254353 A253793

Adjacent sequences:  A253951 A253952 A253953 * A253955 A253956 A253957

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 20 2015

STATUS

approved

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Last modified April 5 20:06 EDT 2020. Contains 333260 sequences. (Running on oeis4.)