A183620 1/120 the number of (n+1)X8 0..4 arrays with every 2X2 subblock containing four distinct values.

46656, 4230144, 383674672, 35321033072, 3272704747696, 304621701959456, 28435992292698928, 2659579711027048176

Offset

1,1

Comments

Column 7 of A183622

Links

Table of n, a(n) for n=1..8.

Example

Some solutions with the first square being 0123 for 3X8
..0..1..0..1..0..3..2..3....0..1..0..1..0..2..3..2....0..1..0..1..0..4..1..4
..2..3..2..4..2..1..4..0....2..3..2..4..3..1..0..4....2..3..2..4..3..2..3..2
..0..4..0..3..0..3..2..1....1..4..0..1..2..4..2..3....4..1..0..1..0..1..4..1

Crossrefs

Sequence in context: A223562 A016866 A016914 * A017058 A017142 A017238

Adjacent sequences: A183617 A183618 A183619 * A183621 A183622 A183623

Keyword

nonn

Author

R. H. Hardin, Jan 06 2011

Status

approved