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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A146616 Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1111-0110 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 5, 19, 43, 79, 175, 645, 2171, 9657, 44753, 231501, 1238311, 7694793, 51485225, 407164775, 3411323191 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

LINKS

Table of n, a(n) for n=1..21.

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.0.1.0.0

.0.0.1.1.1.1.0.0

.1.1.0.1.1.0.1.0

.0.1.1.0.0.1.1.0

.0.1.1.0.0.1.1.0

.0.1.0.1.1.0.1.1

.0.0.1.1.1.1.0.0

.0.0.1.0.0.0.0.0

CROSSREFS

Sequence in context: A094465 A020580 A172043 * A146395 A154302 A146736

Adjacent sequences:  A146613 A146614 A146615 * A146617 A146618 A146619

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 11 15:10 EDT 2022. Contains 356066 sequences. (Running on oeis4.)