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A201273 Number of nX4 0..2 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other 1
3, 12, 14, 85, 199, 143, 740, 1274, 759, 3416, 5312, 2746, 11628, 16676, 7946, 32164, 43438, 19713, 76321, 99347, 43137, 162566, 205231, 86351, 318364, 391600, 161089, 581578, 702330, 282904, 1006014, 1195239, 473473, 1662549, 1947164, 761467 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A201277

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..192

FORMULA

Empirical: a(n) = a(n-3) +2*a(n-6) +a(n-9) -4*a(n-12) -5*a(n-15) +4*a(n-18) +5*a(n-21) +a(n-24) -6*a(n-27) +6*a(n-33) -a(n-36) -5*a(n-39) -4*a(n-42) +5*a(n-45) +4*a(n-48) -a(n-51) -2*a(n-54) -a(n-57) +a(n-60)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Sequence in context: A032918 A039945 A227302 * A221920 A349663 A188549

Adjacent sequences: A201270 A201271 A201272 * A201274 A201275 A201276

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 29 2011

STATUS

approved

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Last modified January 26 16:09 EST 2023. Contains 359828 sequences. (Running on oeis4.)