A206656 Number of (n+2)X7 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly two ways, and new values 0..1 introduced in row major order

22346, 190577, 1839784, 17859249, 175401820, 1731487818, 17082121522, 168628106667, 1665612205466, 16445751889018, 162395951972507, 1603938628358880, 15838780210261248, 156409302430720501

Offset

1,1

Comments

Column 5 of A206659

Links

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

Example

Some solutions for n=4
..0..1..0..0..0..1..1....0..0..0..1..1..0..0....0..1..1..0..0..1..0
..0..0..0..0..1..1..0....0..1..0..1..1..1..1....1..0..1..0..1..1..1
..1..1..1..0..1..1..1....1..0..0..1..0..0..1....0..0..0..0..0..1..0
..0..0..1..0..1..0..0....0..1..0..1..1..0..1....1..0..1..1..1..1..0
..1..0..1..0..0..0..0....1..1..1..1..1..0..0....1..0..1..0..1..1..1
..0..0..1..1..1..1..1....0..1..0..0..1..1..1....0..0..1..0..0..0..1

Crossrefs

Sequence in context: A253042 A216202 A154094 * A329787 A224648 A237215

Adjacent sequences: A206653 A206654 A206655 * A206657 A206658 A206659

Keyword

nonn

Author

R. H. Hardin Feb 11 2012

Status

approved