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A223658 Number of n X n 0..3 arrays with row sums unimodal and column sums inverted unimodal 0
4, 256, 141046, 761845474, 44626165058452 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A223663

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A223795 A207275 A207473 * A207529 A206968 A206789

Adjacent sequences:  A223655 A223656 A223657 * A223659 A223660 A223661

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 25 2013

STATUS

approved

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Last modified January 17 23:51 EST 2022. Contains 350410 sequences. (Running on oeis4.)