A224178 Number of 7Xn 0..3 arrays with rows and antidiagonals unimodal and columns nondecreasing

120, 14400, 794220, 24197608, 468021427, 6360047093, 65713691148, 549557637814, 3906417081652, 24494943831322, 139244456386154, 731876847737254, 3607100658268390, 16837953991281924

Offset

1,1

Comments

Row 7 of A224173

Links

Table of n, a(n) for n=1..14.

Example

Some solutions for n=3
..1..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0
..2..0..0....0..0..1....0..2..0....0..0..0....2..2..0....0..0..0....0..0..0
..2..0..0....0..0..1....1..2..0....0..0..0....2..2..0....0..0..0....0..0..0
..2..1..0....0..2..2....1..2..1....1..0..0....2..3..0....0..0..1....0..2..1
..2..2..1....0..3..2....1..3..2....1..1..1....2..3..0....0..2..1....1..3..1
..2..2..3....0..3..2....3..3..3....1..1..2....2..3..0....0..2..1....3..3..1
..3..3..3....2..3..3....3..3..3....1..3..3....2..3..2....1..3..3....3..3..2

Crossrefs

Sequence in context: A135379 A296913 A059063 * A223870 A224390 A223992

Adjacent sequences: A224175 A224176 A224177 * A224179 A224180 A224181

Keyword

nonn

Author

R. H. Hardin Mar 31 2013

Status

approved