A183619 1/120 the number of (n+1)X7 0..4 arrays with every 2X2 subblock containing four distinct values

7776, 446976, 25713200, 1498220176, 87799260864, 5165337368432, 304621701959456, 17993221408945104, 1063903982909017728, 62948883215402279728, 3726195792332543835152, 220632798983713149344688

Offset

1,1

Comments

Column 6 of A183622

Links

R. H. Hardin, Table of n, a(n) for n = 1..28

Example

Some solutions with the first square being 0123 for 3X7
..0..1..0..3..0..1..0....0..1..0..2..3..2..3....0..1..0..1..4..1..4
..2..3..2..1..2..3..2....2..3..4..1..4..1..4....2..3..4..2..3..2..0
..0..4..0..4..0..4..0....4..1..0..2..0..3..2....4..1..0..1..4..1..3

Crossrefs

Sequence in context: A223561 A016913 A017057 * A017141 A017237 A223274

Adjacent sequences: A183616 A183617 A183618 * A183620 A183621 A183622

Keyword

nonn

Author

R. H. Hardin Jan 06 2011

Status

approved