A204977 Number of nX7 0..2 arrays with no occurrence of three equal elements in a row horizontally, vertically, diagonally or antidiagonally, and new values 0..2 introduced in row major order

224, 301056, 41618941, 8202482914, 1519010368414, 284567725886961

Offset

1,1

Comments

Column 7 of A204978

Links

Table of n, a(n) for n=1..6.

Example

Some solutions for n=5
..0..0..1..1..2..0..0....0..0..1..1..2..0..1....0..0..1..0..2..1..1
..2..1..1..0..1..0..0....1..2..1..2..1..0..1....1..2..1..1..2..1..1
..2..2..0..1..1..2..1....0..2..0..0..1..2..0....1..0..2..2..0..2..2
..1..2..0..0..2..2..0....1..0..0..1..2..2..0....2..1..0..0..1..1..0
..2..0..1..1..2..1..1....1..1..2..0..0..1..2....0..2..2..1..2..2..0

Crossrefs

Sequence in context: A280960 A076007 A280672 * A204704 A206649 A340501

Adjacent sequences: A204974 A204975 A204976 * A204978 A204979 A204980

Keyword

nonn

Author

R. H. Hardin Jan 21 2012

Status

approved