A235821 Number of (4+1) X (n+1) 0..3 arrays with the difference of the upper and lower median value of each 2 X 2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise.

268448, 52510194, 9225012664, 1441675265430, 209596416266780, 28196902285660542, 3557678832961970242, 421909777278978907348, 47357147640683100682322, 5051663776188302152122470

Offset

1,1

Comments

Row 4 of A235818.

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Cf. A235818.

Sequence in context: A234182 A075466 A176384 * A203793 A231197 A061736

Adjacent sequences: A235818 A235819 A235820 * A235822 A235823 A235824

Keyword

nonn

Author

R. H. Hardin, Jan 16 2014

Status

approved