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A253994 Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal median plus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1
2736, 13188, 68176, 350496, 1738927, 8730836, 43840181, 217514688, 1076487005, 5316416857, 26147742882, 128223160536, 627281505519, 3061322367965, 14907228497301, 72450268687501, 351477169523845, 1702262412004744 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A253993

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A297512 A297726 A122473 * A253987 A258904 A221976

Adjacent sequences:  A253991 A253992 A253993 * A253995 A253996 A253997

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 21 2015

STATUS

approved

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Last modified September 21 13:37 EDT 2019. Contains 327253 sequences. (Running on oeis4.)