A204969 Number of (n+2) X 8 0..1 arrays with every 3 X 3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally at least two different ways, and new values 0..1 introduced in row major order.

1323027, 112737183, 9424549410, 768548149208, 63103000253312, 5180662454351231, 425238528169304434, 34906348538365510939, 2865321263251384210972, 235202524781087075942361

Offset

1,1

Comments

Column 6 of A204971.

Links

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

Example

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

Crossrefs

Cf. A204971.

Sequence in context: A116495 A179584 A203868 * A237107 A206620 A214291

Adjacent sequences: A204966 A204967 A204968 * A204970 A204971 A204972

Keyword

nonn

Author

R. H. Hardin, Jan 21 2012

Status

approved