A201427 - OEIS

A201427

Number of nX3 0..2 arrays with rows and columns lexicographically nondecreasing and the instance counts of every value within one of each other

1, 13, 99, 622, 3406, 16399, 70192, 272801, 974066, 3232454, 10054552, 29532523, 82397798, 219500791, 560691234, 1378470505, 3272266551, 7521401992, 16780966687, 36420942317, 77044661996, 159126985181, 321388308477

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

OFFSET

1,2

COMMENTS

Column 3 of A201432

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..91

EXAMPLE

Some solutions for n=7

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A282992 A295271 A034270 * A155646 A089936 A196928

Adjacent sequences: A201424 A201425 A201426 * A201428 A201429 A201430

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 01 2011

STATUS

approved