A206657 Number of (n+2)X8 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

86251, 910169, 11172263, 138177925, 1731487818, 21966491761, 278034719471, 3516414118117, 44628923555800, 565813299809571, 7168644306531356, 90922800550397291, 1152828653381785625, 14613172033518086974

Offset

1,1

Comments

Column 6 of A206659

Links

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

Example

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

Crossrefs

Sequence in context: A186065 A238309 A203388 * A231322 A237783 A236353

Adjacent sequences: A206654 A206655 A206656 * A206658 A206659 A206660

Keyword

nonn

Author

R. H. Hardin Feb 11 2012

Status

approved