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A224018 Number of n X n 0..3 arrays with rows nondecreasing and antidiagonals unimodal 0
4, 100, 6796, 772683, 120352359, 23151623729, 5173325036371, 1291969529189675, 351545826740833046, 102423287609988684833, 31560026488902316691503, 10191808855482615567911934, 3425597818181959478072701084 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A224024

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A223981 A224385 A249939 * A198278 A202990 A324096

Adjacent sequences:  A224015 A224016 A224017 * A224019 A224020 A224021

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 30 2013

STATUS

approved

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Last modified January 19 20:48 EST 2022. Contains 350466 sequences. (Running on oeis4.)