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A201231 Number of nX4 0..3 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other 1
3, 24, 140, 1028, 7791, 66027, 508368, 4293464, 33177954, 282310785, 2226471492, 18845872240, 149352193586, 1252800269866, 9919439949887, 82782378005253, 656171911832714, 5446960364973500, 43213785216715427, 357463895275500826 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A201235

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..23

EXAMPLE

Some solutions for n=6

..0..0..0..0....0..0..0..1....0..0..0..1....0..0..0..0....0..0..0..0

..0..1..2..1....0..1..1..1....0..0..0..2....0..1..1..1....0..0..3..1

..0..1..2..3....0..3..3..2....1..1..1..2....0..3..2..3....2..2..2..3

..1..1..3..2....0..3..2..2....1..3..2..3....1..3..2..2....1..2..3..2

..3..3..3..3....1..3..2..2....1..2..3..2....1..3..2..2....1..1..3..2

..1..2..2..2....1..3..2..3....2..3..3..3....1..3..2..3....1..1..3..3

CROSSREFS

Sequence in context: A215636 A056350 A056344 * A212698 A226511 A125651

Adjacent sequences:  A201228 A201229 A201230 * A201232 A201233 A201234

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 28 2011

STATUS

approved

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Last modified August 14 10:47 EDT 2020. Contains 336480 sequences. (Running on oeis4.)