A184693 1/3 the number of nX8 0..2 arrays with no element equal both to the element above and to the element to its left

2187, 6291456, 17666296320, 49534593003552, 138877768818516672, 389362817519503469280, 1091631544523681779567680, 3060537246479645213149335744, 8580631691388515533867028831616

Offset

1,1

Comments

Column 8 of A184694

Links

R. H. Hardin, Table of n, a(n) for n = 1..114

Example

Some solutions for 3X8 with a(1,1)=0
..0..0..0..0..0..0..0..1....0..0..0..1..0..0..0..1....0..0..0..0..0..0..2..2
..0..1..1..1..2..2..2..0....0..1..1..2..0..1..0..1....0..1..1..1..2..1..1..1
..0..0..0..0..2..0..1..0....0..0..0..0..1..2..2..1....0..0..0..0..2..2..2..2

Crossrefs

Sequence in context: A223794 A223980 A223575 * A017023 A017107 A018875

Adjacent sequences: A184690 A184691 A184692 * A184694 A184695 A184696

Keyword

nonn

Author

R. H. Hardin Jan 20 2011

Status

approved