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

243, 98304, 39133824, 15564399648, 6189975781728, 2461751303097216, 979037502950237760, 389362817519503469280, 154849434408870800843040, 61583557179340633440836160, 24491755680833694286332417792

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