A223817 - OEIS

A223817

Number of 3Xn 0..2 arrays with row sums nondecreasing and column sums unimodal

10, 222, 4120, 65465, 921010, 11789302, 139965348, 1562685952, 16583874090, 168662333466, 1654400665258, 15732261029037, 145639935220714, 1317015705919726, 11667008847929888, 101490035584201884

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Row 3 of A223815

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..48

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A199748 A210137 A064333 * A317171 A229256 A342601

Adjacent sequences: A223814 A223815 A223816 * A223818 A223819 A223820

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 27 2013

STATUS

approved