A235820 Number of (3+1)X(n+1) 0..3 arrays with the difference of the upper and lower median value of each 2X2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise

28978, 2273170, 153490516, 8998042696, 482216047328, 23797784915364, 1102892178841080, 48371216588677388, 2027649275673524316, 81727952535760564092, 3186374072680537092694, 120692189251721727046564

Offset

1,1

Comments

Row 3 of A235818

Links

R. H. Hardin, Table of n, a(n) for n = 1..163

Example

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

Crossrefs

Sequence in context: A237232 A031636 A364720 * A235817 A235576 A206017

Adjacent sequences: A235817 A235818 A235819 * A235821 A235822 A235823

Keyword

nonn

Author

R. H. Hardin, Jan 16 2014

Status

approved