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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A077056 Total number of "humps" in all A005316(2n) open meanders with 2n crossings. 2
1, 1, 4, 22, 140, 992, 7584, 61420, 520320, 4570292, 41354416, 383609434, 3634231140, 35059333218, 343580813492, 3413862553800, 34336784362232, 349131316634164, 3584622273967324, 37128374058146138, 387630493693010928 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

A "hump" is a local maxima of the upper envelope of the part of the meander that extends above the East-West road.

LINKS

Table of n, a(n) for n=0..20.

EXAMPLE

The three open meanders with 4 crossings have respectively 2, 1 and 1 humps, so a(2) = 4.

CROSSREFS

Cf. A005316 (open meanders).

Sequence in context: A002293 A181784 A003287 * A227404 A190271 A045744

Adjacent sequences:  A077053 A077054 A077055 * A077057 A077058 A077059

KEYWORD

nonn

AUTHOR

N. J. A. Sloane and Jon Wild, Nov 29 2002

EXTENSIONS

a(9)-a(20) from Andrew Howroyd, Nov 22 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 26 20:19 EDT 2019. Contains 324380 sequences. (Running on oeis4.)