A204974 Number of nX4 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

11, 726, 16813, 451468, 11815256, 311275169, 8202482914, 216132492162, 5694910498914, 150054777556991, 3953775892498008, 104177764014536592, 2744972159153714019, 72327078831355250520, 1905740996306739704109

Offset

1,1

Comments

Column 4 of A204978

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A301732 A028457 A222653 * A204701 A267954 A206646

Adjacent sequences: A204971 A204972 A204973 * A204975 A204976 A204977

Keyword

nonn

Author

R. H. Hardin Jan 21 2012

Status

approved