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A275086 Number of nX4 0..2 arrays with no element equal to any value at offset (0,-2) (-1,-2) or (-2,-1) and new values introduced in order 0..2. 1
6, 96, 508, 3088, 18440, 111900, 675600, 4094240, 24794560, 150165020, 909361668, 5507667148, 33356744732, 202019640344, 1223500857956, 7410005643024, 44877800876060, 271796556988084, 1646101595999968, 9969411699754184 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A275090.

LINKS

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

FORMULA

Empirical: a(n) = 3*a(n-1) +8*a(n-2) +46*a(n-3) +133*a(n-4) -64*a(n-5) -492*a(n-6) -520*a(n-7) +568*a(n-8) -1592*a(n-9) +1156*a(n-10) +1328*a(n-11) -4992*a(n-12) +1440*a(n-13) +3456*a(n-14) for n>15

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A275090.

Sequence in context: A275561 A116289 A116256 * A222971 A196813 A179058

Adjacent sequences:  A275083 A275084 A275085 * A275087 A275088 A275089

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 16 2016

STATUS

approved

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Last modified September 17 08:57 EDT 2019. Contains 327128 sequences. (Running on oeis4.)