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A223783 Number of n X n 0..2 arrays with rows, diagonals and antidiagonals unimodal 0
3, 81, 8635, 1560013, 343454446, 82093381460, 20229461153969, 5020313112266183 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A223789

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A223825 A207222 A207007 * A223969 A207202 A206856

Adjacent sequences: A223780 A223781 A223782 * A223784 A223785 A223786

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 27 2013

STATUS

approved

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Last modified March 21 17:39 EDT 2023. Contains 361408 sequences. (Running on oeis4.)