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A253977 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal maximum plus antidiagonal maximum nondecreasing horizontally and vertically 0
512, 36434, 8727838, 6386040127, 14408056664402, 102388257971324416, 2226119429950951897595, 151063750081520227274811711, 31807128404517752548656750421959, 20709613032568160385951820991247134611 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A253985

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=2

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

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

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

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

CROSSREFS

Sequence in context: A308815 A253536 A254383 * A254084 A284033 A240933

Adjacent sequences:  A253974 A253975 A253976 * A253978 A253979 A253980

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 21 2015

STATUS

approved

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Last modified August 11 19:26 EDT 2022. Contains 356066 sequences. (Running on oeis4.)