A183579 Half the number of nX4 0..3 arrays with each element equal to either the maximum or the minimum of its horizontal and vertical neighbors

8, 407, 9667, 240358, 5987795, 149355515, 3724940988, 92915045150, 2317648165893, 57811518197886, 1442053664104187, 35970710709296927, 897256757776720016, 22381259751777880373, 558280348730102033060

Offset

1,1

Comments

Column 4 of A183584

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions with a(1,1)<=1 for 3X4
..0..0..2..1....1..1..1..1....1..1..1..1....1..3..1..1....0..0..1..1
..1..0..2..1....1..3..1..1....0..0..2..2....1..3..3..1....1..1..1..1
..1..0..2..2....1..3..3..1....0..0..0..2....2..2..3..3....1..0..0..1

Crossrefs

Sequence in context: A220550 A191874 A323575 * A015091 A008274 A188422

Adjacent sequences: A183576 A183577 A183578 * A183580 A183581 A183582

Keyword

nonn

Author

R. H. Hardin Jan 05 2011

Status

approved