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A251002 Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock having its maximum diagonal element less than the absolute difference of its antidiagonal elements 0
69, 10743, 11671623, 87861924805, 4588026318857390, 1661795248800209092018, 4174999762523849415510268532, 72754439546501362273096881625623943, 8794003889120582191141511584460660923446950 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A251010

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=2

..2..2..1....1..1..1....2..0..1....0..2..1....1..0..0....0..1..1....0..2..0

..1..2..2....1..0..0....2..0..1....1..1..2....0..2..2....2..1..1....2..2..0

..1..1..0....0..0..2....2..1..2....2..1..1....2..0..0....1..2..1....1..0..1

CROSSREFS

Sequence in context: A234824 A232719 A297807 * A194612 A297768 A268847

Adjacent sequences:  A250999 A251000 A251001 * A251003 A251004 A251005

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 29 2014

STATUS

approved

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Last modified August 19 13:44 EDT 2022. Contains 356228 sequences. (Running on oeis4.)