A223878 Number of 4Xn 0..3 arrays with rows, diagonals and antidiagonals unimodal

256, 65536, 3863372, 88682677, 1271992512, 13394424591, 112751480926, 798519332969, 4918189868664, 26945689043408, 133456233695247, 604775893442790, 2531399109074463, 9862376758221364, 35997221510544568

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