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A251186 Number of (n+2)X(n+2) 0..1 arrays with nondecreasing sum of every three consecutive values in every row and column 1
512, 7776, 209952, 10077696, 259200000, 9600000000, 512000000000, 16807000000000, 720600125000000, 40353607000000000, 1525017689435520000, 71151225318303621120, 4098310578334288576512, 169762607240564688666624 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A251192

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..20

EXAMPLE

Some solutions for n=2

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

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

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

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

CROSSREFS

Sequence in context: A222775 A257419 A255749 * A257202 A070057 A017619

Adjacent sequences:  A251183 A251184 A251185 * A251187 A251188 A251189

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 30 2014

STATUS

approved

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Last modified June 18 14:52 EDT 2019. Contains 324213 sequences. (Running on oeis4.)