A188745 Number of n X 7 binary arrays without the pattern 1 1 1 diagonally, vertically or antidiagonally.

128, 16384, 371641, 20544154, 1127318294, 47325959200, 2307086087740, 111642244016936, 5198138560322655, 247778079713183493, 11784953664767609408, 557503350633218495686, 26469014360403565983659

Offset

1,1

Comments

Column 7 of A188747.

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for 3 X 7
..0..0..0..0..1..0..1....0..0..0..0..0..1..0....0..0..0..0..0..1..0
..1..1..1..0..1..1..0....1..0..0..0..1..0..1....1..0..1..1..0..0..0
..1..1..1..0..0..0..0....0..0..1..0..0..0..0....1..0..1..0..0..0..0

Crossrefs

Cf. A188747.

Sequence in context: A223674 A189622 A189694 * A188997 A223685 A189069

Adjacent sequences: A188742 A188743 A188744 * A188746 A188747 A188748

Keyword

nonn

Author

R. H. Hardin, Apr 09 2011

Status

approved