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A224385 Number of n X n 0..3 arrays with diagonals and antidiagonals unimodal and rows nondecreasing 0
4, 100, 6094, 497958, 45648753, 4364554008, 424124440444, 41437298593764, 4056267677083719, 397503667576768219 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A224391

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A224167 A223858 A223981 * A249939 A224018 A198278

Adjacent sequences:  A224382 A224383 A224384 * A224386 A224387 A224388

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 05 2013

STATUS

approved

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Last modified February 26 05:51 EST 2020. Contains 332277 sequences. (Running on oeis4.)