A236785 Number of (n+1)X(4+1) 0..2 arrays with the upper median plus the lower median minus the minimum of every 2X2 subblock equal

2475, 19851, 145124, 1287919, 10951425, 101820364, 921870137, 8733287503, 81211467440, 774898990883, 7293638090037, 69775296750588, 660733874896417, 6326252988398973, 60109364320802748, 575636103622182519

Offset

1,1

Comments

Column 4 of A236789

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A183703 A282559 A278733 * A020411 A124594 A241048

Adjacent sequences: A236782 A236783 A236784 * A236786 A236787 A236788

Keyword

nonn

Author

R. H. Hardin, Jan 31 2014

Status

approved