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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 1
20, 43, 479, 4474, 32959, 204056, 1209492, 7316891, 44430342, 260942687, 1458406289, 7769314333, 39698813306, 195484409069, 930466275825, 4292158352171, 19240147010037, 84029266162705, 358361605456031 (list; graph; refs; listen; history; text; internal format)
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

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Last modified May 18 15:59 EDT 2022. Contains 353816 sequences. (Running on oeis4.)