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!)
A146711 Number of n X n binary arrays symmetric about the diagonal and 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, 1, 1, 1, 1, 1, 1, 7, 7, 21, 21, 51, 51, 237, 237, 1129, 1129, 8811 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,13

LINKS

Table of n, a(n) for n=1..23.

EXAMPLE

Maximal 13 X 13 example

.0.0.1.1.0.0.0.0.0.1.1.0.0

.0.0.1.1.1.1.0.1.1.1.1.0.0

.1.1.0.1.0.0.0.0.0.1.0.1.1

.1.1.1.0.0.0.0.0.0.0.1.1.1

.0.1.0.0.0.0.0.0.0.0.0.1.0

.0.1.0.0.0.0.0.0.0.0.0.1.0

.0.0.0.0.0.0.0.0.0.0.0.0.0

.0.1.0.0.0.0.0.0.0.0.0.1.0

.0.1.0.0.0.0.0.0.0.0.0.1.0

.1.1.1.0.0.0.0.0.0.0.1.1.1

.1.1.0.1.0.0.0.0.0.1.0.1.1

.0.0.1.1.1.1.0.1.1.1.1.0.0

.0.0.1.1.0.0.0.0.0.1.1.0.0

CROSSREFS

Sequence in context: A146703 A146615 A146735 * A146402 A146410 A146466

Adjacent sequences:  A146708 A146709 A146710 * A146712 A146713 A146714

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

EXTENSIONS

Example repaired. - R. H. Hardin, Nov 05 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 03:38 EDT 2021. Contains 348141 sequences. (Running on oeis4.)