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A254914 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the central row and central column plus the two minimums of the diagonal and antidiagonal nondecreasing horizontally and vertically 1
512, 19890, 1041262, 28576911, 549282376, 7539746842, 82012007541, 1556819513546, 17747014175801, 264891745874783, 7544378754973669, 128524099836716025, 1084428849732639859, 284665689827815340390 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A254922

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..19

EXAMPLE

Some solutions for n=2

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

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

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

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

CROSSREFS

Sequence in context: A096962 A231308 A254735 * A186831 A236215 A254182

Adjacent sequences:  A254911 A254912 A254913 * A254915 A254916 A254917

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 10 2015

STATUS

approved

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Last modified February 16 15:17 EST 2020. Contains 331961 sequences. (Running on oeis4.)