A183621 1/120 the number of (n+1)X9 0..4 arrays with every 2X2 subblock containing four distinct values

279936, 40034304, 5726373936, 833329037376, 122134207285776, 17993221408945104, 2659579711027048176

Offset

1,1

Comments

Column 8 of A183622

Links

Table of n, a(n) for n=1..7.

Example

Some solutions with the first square being 0123 for 3X9
..0..1..0..1..0..4..1..2..4....0..1..0..1..0..3..4..1..2
..2..3..2..4..3..2..3..0..3....2..3..2..3..2..1..2..3..4
..1..0..1..0..1..4..1..4..2....1..0..1..0..4..3..4..0..1

Crossrefs

Sequence in context: A013909 A016867 A016915 * A017059 A017143 A017239

Adjacent sequences: A183618 A183619 A183620 * A183622 A183623 A183624

Keyword

nonn

Author

R. H. Hardin Jan 06 2011

Status

approved