A204968 Number of (n+2)X7 0..1 arrays with every 3X3 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

219755, 11064389, 547910909, 26548318278, 1294422106052, 63103000253312, 3075660728764228, 149917008692340855, 7307374345089599577, 356181560686179960227, 17361282472044746608190, 846237255084435072552419

Offset

1,1

Comments

Column 5 of A204971

Links

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

Example

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

Crossrefs

Sequence in context: A254912 A254905 A257207 * A294014 A234489 A321160

Adjacent sequences: A204965 A204966 A204967 * A204969 A204970 A204971

Keyword

nonn

Author

R. H. Hardin Jan 21 2012

Status

approved