login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A068471 Number of n X n binary matrices with each 1 having at most 2 adjacent 1's. 1
2, 16, 378, 30824, 8402216, 7664347268, 23371379782671, 238225926162821893, 8118262028301675826132, 924887563235974860108746534, 352261845112790535941917078458268 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..11.

CROSSREFS

No adjacent 1's A006506, one adjacent 1 A067968.

Sequence in context: A009341 A015201 A227406 * A140308 A280723 A052737

Adjacent sequences:  A068468 A068469 A068470 * A068472 A068473 A068474

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 10 2002

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 April 20 09:59 EDT 2019. Contains 322309 sequences. (Running on oeis4.)