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A250860 Number of (n+2)X(n+2) 0..3 arrays with nondecreasing sum of every three consecutive values in every row and column 1
262144, 128000000, 250000000000, 1953125000000000, 5744580078125000000, 43254022503125000000000, 833747762130149888000000000, 6537811332601933992442920960000, 104624647058119410496536003666247680 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A250868

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..12

EXAMPLE

Some solutions for n=1

..0..2..3....2..0..3....0..2..1....0..3..0....0..0..1....2..0..2....0..1..1

..3..3..3....0..3..2....2..2..3....3..0..2....2..3..3....2..1..2....3..2..2

..2..1..0....3..3..1....2..2..1....1..3..1....3..3..2....2..3..2....3..0..0

CROSSREFS

Sequence in context: A016785 A017490 A017622 * A016809 A018879 A016905

Adjacent sequences:  A250857 A250858 A250859 * A250861 A250862 A250863

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 28 2014

STATUS

approved

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Last modified February 26 16:33 EST 2020. Contains 332284 sequences. (Running on oeis4.)