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A184691 1/3 the number of nX6 0..2 arrays with no element equal both to the element above and to the element to its left 1
243, 98304, 39133824, 15564399648, 6189975781728, 2461751303097216, 979037502950237760, 389362817519503469280, 154849434408870800843040, 61583557179340633440836160, 24491755680833694286332417792 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A184694

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

FORMULA

Empirical: a(n)=483*a(n-1)-37260*a(n-2)+1406078*a(n-3)-32825379*a(n-4)+522499249*a(n-5)-5935275892*a(n-6)+48955308778*a(n-7)-292045494268*a(n-8)+1227794612112*a(n-9)-3438890819616*a(n-10)+5747863337984*a(n-11)-4538037229568*a(n-12)+808526872576*a(n-13)+1304252383232*a(n-14)-1133951057920*a(n-15)+395539644416*a(n-16)-52613349376*a(n-17)

EXAMPLE

Some solutions for 3X6 with a(1,1)=0

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

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

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

CROSSREFS

Sequence in context: A223329 A216328 A086649 * A017021 A017105 A017201

Adjacent sequences:  A184688 A184689 A184690 * A184692 A184693 A184694

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 20 2011

STATUS

approved

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Last modified October 28 17:19 EDT 2021. Contains 348329 sequences. (Running on oeis4.)