A204950 Number of (n+2)X6 0..2 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly two different ways, and new values 0..2 introduced in row major order

242852, 4566666, 94983268, 1616210763, 33301704234, 691810208216, 13020576504578, 263790704809901, 5371358916401630, 104618583626956845, 2101362288613315951, 42349487423534501630, 836505454550051062470

Offset

1,1

Comments

Column 4 of A204954

Links

R. H. Hardin, Table of n, a(n) for n = 1..65

Example

Some solutions for n=3
..0..0..1..1..1..0....0..0..0..0..1..0....0..0..1..2..0..0....0..1..0..0..0..0
..1..1..1..1..2..0....1..2..0..1..1..1....0..1..0..0..0..0....1..0..0..1..2..2
..2..2..2..1..2..0....0..2..0..1..1..2....0..0..0..0..1..1....1..0..0..1..1..1
..0..2..0..1..1..0....2..2..0..0..0..0....2..2..2..0..1..1....0..1..0..1..0..0
..1..1..1..1..1..0....2..2..0..1..1..1....0..0..1..0..1..2....0..0..0..1..2..1

Crossrefs

Sequence in context: A078871 A249209 A066082 * A244545 A248447 A187534

Adjacent sequences: A204947 A204948 A204949 * A204951 A204952 A204953

Keyword

nonn

Author

R. H. Hardin Jan 20 2012

Status

approved