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!)
A146178 Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 110-100-111 pattern in any orientation. 0
1, 1, 1, 1, 5, 29, 161, 905, 3749, 24539, 286931, 3046339, 51706885, 1159037433, 32728917231, 966827028811 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,5
LINKS
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.0.0.0
.0.0.0.0.1.1.1.0
.1.1.1.0.1.0.1.0
.1.0.1.0.1.0.0.1
.1.0.0.1.0.1.0.1
.0.1.0.1.0.1.1.1
.0.1.1.1.0.0.0.0
.0.0.0.0.0.0.0.0
CROSSREFS
Sequence in context: A098780 A222700 A272940 * A272751 A015537 A182017
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 27 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 February 20 17:43 EST 2024. Contains 370215 sequences. (Running on oeis4.)