login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A146712 Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1100-1111-0100 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 3, 21, 41, 81, 159, 629, 2101 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.1.1.0.0

.0.0.1.1.1.1.0.0

.1.1.0.0.1.0.1.0

.1.1.1.0.0.0.1.0

.0.1.0.0.0.1.1.1

.0.1.0.1.0.0.1.1

.0.0.1.1.1.1.0.0

.0.0.1.1.0.0.0.0

CROSSREFS

Sequence in context: A178082 A056387 A056377 * A318549 A217000 A034186

Adjacent sequences:  A146709 A146710 A146711 * A146713 A146714 A146715

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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 21 00:18 EDT 2021. Contains 348119 sequences. (Running on oeis4.)