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A275181 Number of nX6 0..2 arrays with no element equal to any value at offset (-2,-1) (-1,0) or (-1,1) and new values introduced in order 0..2. 1
122, 1024, 1129, 1651, 6081, 23313, 90793, 355258, 1392050, 5466938, 21539426, 85093786, 336588196, 1331473727, 5265942503, 20828817622, 82420863039, 326283110365, 1291905762290, 5114955533848, 20248639590431, 80153872862995 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A275183.

LINKS

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

FORMULA

Empirical: a(n) = 32*a(n-1) -496*a(n-2) +4961*a(n-3) -35960*a(n-4) +201091*a(n-5) -902032*a(n-6) +3333981*a(n-7) -10358635*a(n-8) +27489359*a(n-9) -63147252*a(n-10) +127012656*a(n-11) -225853366*a(n-12) +357739737*a(n-13) -507298821*a(n-14) +645538311*a(n-15) -736806613*a(n-16) +752032038*a(n-17) -682548311*a(n-18) +546209109*a(n-19) -380703800*a(n-20) +226996531*a(n-21) -112609944*a(n-22) +44283885*a(n-23) -12407657*a(n-24) +1618639*a(n-25) +454684*a(n-26) -304782*a(n-27) +64173*a(n-28) +1145*a(n-29) -3123*a(n-30) +439*a(n-31) +34*a(n-32) -12*a(n-33) -a(n-34) for n>39

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A275183.

Sequence in context: A229722 A092775 A238033 * A275129 A281060 A274726

Adjacent sequences:  A275178 A275179 A275180 * A275182 A275183 A275184

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 19 2016

STATUS

approved

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Last modified January 24 21:35 EST 2022. Contains 350565 sequences. (Running on oeis4.)