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!)
A145967 Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a one by five or five by one block. 0
1, 1, 1, 1, 1, 3, 8, 27, 89, 333, 1310, 7293, 48975, 401989, 3756663, 40465266, 497724568, 7379658407, 131602632698, 2820564955461, 71452077409468, 2129247440397929, 74391175132817461, 3073387865714226226 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,6
LINKS
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.0.0.0
.0.0.1.1.1.1.1.0
.0.1.0.0.0.0.0.1
.0.1.0.0.0.0.0.1
.0.1.0.0.0.0.0.1
.0.1.0.0.0.0.0.1
.0.1.0.0.0.0.0.1
.0.0.1.1.1.1.1.0
CROSSREFS
Sequence in context: A210680 A121650 A151462 * A145792 A148834 A148835
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 25 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 March 29 09:32 EDT 2024. Contains 371268 sequences. (Running on oeis4.)