A220006 Number of nX4 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 nX4 array

20, 43, 479, 4474, 32959, 204056, 1209492, 7316891, 44430342, 260942687, 1458406289, 7769314333, 39698813306, 195484409069, 930466275825, 4292158352171, 19240147010037, 84029266162705, 358361605456031

Offset

1,1

Comments

Column 4 of A220010

Links

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

Example

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

Crossrefs

Sequence in context: A290184 A126251 A100515 * A295795 A039322 A043145

Adjacent sequences: A220003 A220004 A220005 * A220007 A220008 A220009

Keyword

nonn

Author

R. H. Hardin Dec 03 2012

Status

approved