A146667 - OEIS

A146667

Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-0111-0110 pattern in any orientation.

1, 1, 1, 1, 1, 1, 17, 31, 603, 1115, 11773, 31193, 660175, 1987061, 224682951, 885526067, 157313783505, 768394153739, 158904168376893, 960773446522435, 410688920693142221, 3062625865459683273

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

OFFSET

1,7

LINKS

Table of n, a(n) for n=1..22.

EXAMPLE

Maximal 8 X 8 example

.0.1.0.0.0.0.1.0

.0.1.1.0.0.1.1.0

.1.1.1.0.0.1.1.1

.1.0.0.0.0.0.0.1

.0.0.1.0.0.1.0.0

.1.1.1.0.0.1.1.1

.1.1.0.0.0.0.1.1

.0.1.0.0.0.0.1.0

CROSSREFS

Sequence in context: A045700 A146800 A146731 * A146462 A089171 A279370

Adjacent sequences: A146664 A146665 A146666 * A146668 A146669 A146670

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved