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!)
A046723 Number of semi-meanders of order n with 4 components. 2
1, 4, 17, 66, 254, 956, 3584, 13256, 49052, 179552, 658560, 2394504, 8724464, 31575096, 114451388, 412811544, 1490190544, 5360943684, 19288139802, 69245171564, 248463024330, 890477645192, 3188033497580, 11409453277272, 40771092374710, 145735210316376, 519955750491512 (list; graph; refs; listen; history; text; internal format)
OFFSET
4,2
LINKS
P. Di Francesco, O. Golinelli and E. Guitter, Meander, folding and arch statistics, arXiv:hep-th/9506030, 1995.
CROSSREFS
Sequence in context: A202555 A045992 A217539 * A291394 A244616 A030529
KEYWORD
nonn
AUTHOR
EXTENSIONS
a(15)-a(40) from Andrew Howroyd, Dec 07 2015
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 01:36 EDT 2024. Contains 371264 sequences. (Running on oeis4.)