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A250436 Number of (n+1)X(n+1) 0..2 arrays with nondecreasing sum of every two consecutive values in every row and column 0
81, 2160, 160000, 8750000, 937890625, 74118870000, 9682651996416, 958582547645184, 141763707879526656, 16346105372357849088, 2632478657451209588736, 338880211548064890612480 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A250443

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A296577 A237316 A237722 * A237545 A253399 A236820

Adjacent sequences:  A250433 A250434 A250435 * A250437 A250438 A250439

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 22 2014

STATUS

approved

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Last modified July 27 02:39 EDT 2021. Contains 346302 sequences. (Running on oeis4.)