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A223878 Number of 4Xn 0..3 arrays with rows, diagonals and antidiagonals unimodal 1
256, 65536, 3863372, 88682677, 1271992512, 13394424591, 112751480926, 798519332969, 4918189868664, 26945689043408, 133456233695247, 604775893442790, 2531399109074463, 9862376758221364, 35997221510544568 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A223876

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..177

R. H. Hardin, Empirical polynomial of degree 24

FORMULA

Empirical polynomial of degree 24 (see link above)

EXAMPLE

Some solutions for n=3

..2..0..0....0..0..2....0..0..0....0..0..0....0..0..2....0..0..0....0..0..0

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

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

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

CROSSREFS

Sequence in context: A189070 A189195 A188880 * A188909 A189110 A223803

Adjacent sequences:  A223875 A223876 A223877 * A223879 A223880 A223881

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 28 2013

STATUS

approved

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Last modified May 18 21:30 EDT 2022. Contains 353825 sequences. (Running on oeis4.)