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A223955 Number of n X n 0..3 arrays with antidiagonals unimodal and rows and diagonals nondecreasing 0
4, 85, 3471, 176893, 9779558, 556027700, 31770135236, 1805384910990, 101606391647751, 5657068092397559, 311737148953336261, 17023765723406625834, 922742812050648219706 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A223961

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A184100 A059830 A189831 * A116330 A055776 A055591

Adjacent sequences:  A223952 A223953 A223954 * A223956 A223957 A223958

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 29 2013

STATUS

approved

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Last modified October 22 04:53 EDT 2021. Contains 348160 sequences. (Running on oeis4.)