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A209014 Number of nX3 0..3 arrays with no element equal the average of immediate neighbors vertically above, diagonally above and left, and horizontally left of it 1
36, 1430, 57412, 2303052, 92409982, 3707858104, 148774643618, 5969451726624, 239519039453858, 9610491871316864, 385612583729466606, 15472367675895217344, 620815222721162751908, 24909667900333112532040 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A209019

LINKS

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

FORMULA

Empirical: a(n) = 30*a(n-1) +507*a(n-2) -3690*a(n-3) -16906*a(n-4) +106528*a(n-5) +124733*a(n-6) -1050424*a(n-7) +577820*a(n-8) +3131188*a(n-9) -4615763*a(n-10) -850984*a(n-11) +5888706*a(n-12) -4406256*a(n-13) +1242404*a(n-14) -133476*a(n-15) +1080*a(n-16) +864*a(n-17)

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A218518 A099366 A095657 * A268897 A034996 A166770

Adjacent sequences:  A209011 A209012 A209013 * A209015 A209016 A209017

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 04 2012

STATUS

approved

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Last modified January 24 17:24 EST 2021. Contains 340411 sequences. (Running on oeis4.)