A206649 Number of nX7 0..2 arrays with no occurrence of three equal elements in a row horizontally or vertically, and new values 0..2 introduced in row major order

224, 301056, 180716227, 134185561617, 94026798615720, 66923081500826797, 47431914936748228227, 33655725191129741926976, 23873388521297916754784915, 16935776648670564255296973109, 12013968003497755426965647537206

Offset

1,1

Comments

Column 7 of A206650

Links

R. H. Hardin, Table of n, a(n) for n = 1..43

Example

Some solutions for n=4
..0..1..1..0..0..1..2....0..1..0..2..1..2..2....0..0..1..1..2..0..1
..2..0..0..1..2..0..2....2..2..1..1..2..1..0....2..0..2..2..0..2..2
..2..0..1..0..0..1..0....0..0..1..1..2..1..0....0..1..2..1..2..1..2
..0..1..2..0..0..2..0....2..1..2..2..1..2..1....1..0..0..1..1..2..0

Crossrefs

Sequence in context: A280672 A204977 A204704 * A340501 A370611 A265432

Adjacent sequences: A206646 A206647 A206648 * A206650 A206651 A206652

Keyword

nonn

Author

R. H. Hardin Feb 11 2012

Status

approved