A219574 Number of nX4 arrays of the minimum value of corresponding elements and their horizontal or vertical neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 nX4 array

20, 132, 1866, 18564, 154271, 1230906, 9838834, 77121132, 574114068, 4011221077, 26423019415, 165621299493, 995370542165, 5764471362464, 32276996597715, 175191988301623, 923800070721626, 4741175946914574, 23718827918983202

Offset

1,1

Comments

Column 4 of A219578

Links

R. H. Hardin, Table of n, a(n) for n = 1..131

Example

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

Crossrefs

Sequence in context: A005551 A006417 A156392 * A356272 A188145 A168178

Adjacent sequences: A219571 A219572 A219573 * A219575 A219576 A219577

Keyword

nonn

Author

R. H. Hardin Nov 23 2012

Status

approved