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A229842 Number of nX3 0..2 arrays x(i,j) with each element horizontally or vertically next to at least one element with value 2-x(i,j) 1
3, 81, 987, 13401, 178311, 2381469, 31783299, 424240833, 5662582239, 75582071565, 1008840783171, 13465626160209, 179734091085543, 2399022766771749, 32021249796760479, 427407548197383945, 5704874525707845543 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A229847

LINKS

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

FORMULA

Empirical: a(n) = 10*a(n-1) +44*a(n-2) +20*a(n-3) -122*a(n-4) -303*a(n-5) -129*a(n-6) +244*a(n-7) +526*a(n-8) -74*a(n-9) -220*a(n-10) -225*a(n-11) +96*a(n-12) +172*a(n-13) -50*a(n-14) +44*a(n-15)

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A116009 A068562 A123656 * A223187 A060851 A116179

Adjacent sequences:  A229839 A229840 A229841 * A229843 A229844 A229845

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 01 2013

STATUS

approved

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Last modified December 5 12:24 EST 2021. Contains 349557 sequences. (Running on oeis4.)