A189906 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A189906

Number of 4Xn binary arrays without the pattern 0 0 1 1 diagonally, vertically, antidiagonally or horizontally

15, 225, 3375, 35656, 372850, 3833322, 39048081, 395408137, 3984364191, 40031462211, 401659633507, 4025118368372, 40315220042932, 403641830599161, 4040392891662855, 40438586707202572, 404700496922543129

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Row 4 of A189905

LINKS

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

EXAMPLE

Some solutions for 4X4

..0..0..0..0....0..1..1..0....0..1..0..1....1..1..1..0....1..0..1..1

..1..1..1..1....0..0..0..1....1..1..0..0....0..1..0..1....1..1..0..0

..0..0..0..0....1..0..1..0....1..0..0..1....1..0..0..0....0..0..1..0

..1..0..0..0....0..1..0..0....0..0..1..0....0..1..1..0....0..1..0..1

CROSSREFS

Sequence in context: A012852 A171289 A262336 * A189900 A189338 A189774

Adjacent sequences: A189903 A189904 A189905 * A189907 A189908 A189909

KEYWORD

nonn

AUTHOR

R. H. Hardin May 01 2011

STATUS

approved