A204701 Number of nX4 0..2 arrays with no occurrence of three equal elements in a row horizontally, vertically or nw-to-se diagonally, and new values 0..2 introduced in row major order

11, 726, 22869, 835135, 29846373, 1074195735, 38585324821, 1386815731346, 49835668719324, 1790952554181415, 64360800888516224, 2312920275315600518, 83118816237627091277, 2987020411865810161864, 107343805323748931471929

Offset

1,1

Comments

Column 4 of A204705

Links

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

Example

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

Crossrefs

Sequence in context: A028457 A222653 A204974 * A267954 A206646 A267908

Adjacent sequences: A204698 A204699 A204700 * A204702 A204703 A204704

Keyword

nonn

Author

R. H. Hardin Jan 18 2012

Status

approved