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A229367 Number of nX3 0..2 arrays avoiding 11 horizontally, 22 vertically and 00 antidiagonally 1
22, 184, 1610, 13937, 122497, 1067299, 9346997, 81633583, 713982837, 6240061504, 54556988152, 476904755485, 4169201095109, 36446367090562, 318614423423484, 2785298770230012, 24348966185185668, 212857075051476381 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A229372

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) +61*a(n-2) +48*a(n-3) -586*a(n-4) -158*a(n-5) +2199*a(n-6) -1140*a(n-7) -1304*a(n-8) +440*a(n-9) +416*a(n-10) +64*a(n-11)

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A248494 A248495 A248496 * A129126 A231749 A072040

Adjacent sequences:  A229364 A229365 A229366 * A229368 A229369 A229370

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 21 2013

STATUS

approved

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Last modified September 26 09:15 EDT 2021. Contains 347664 sequences. (Running on oeis4.)