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!)
A146174 Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 110-100-111 pattern in any orientation. 0
1, 1, 1, 1, 3, 13, 31, 79, 513, 4397, 30071, 246251, 3267201, 56899771, 1043804543, 23549434373, 739313753641, 29199724578735, 1349766896974211, 78078882718269849, 5907673396173869799 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,5
LINKS
EXAMPLE
Maximal 8 X 8 example
.0.0.1.1.1.0.0.0
.0.0.0.0.1.0.0.0
.1.0.0.1.1.0.0.0
.1.0.1.0.0.1.1.1
.1.1.1.0.0.1.0.1
.0.0.0.1.1.0.0.1
.0.0.0.1.0.0.0.0
.0.0.0.1.1.1.0.0
CROSSREFS
Sequence in context: A007686 A147030 A146259 * A147134 A146842 A146191
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 21 16:55 EST 2024. Contains 370237 sequences. (Running on oeis4.)