login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A052418 Number of n-crossing knots having symmetry group D4. 0
0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 11, 18, 21, 31, 53, 89 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

REFERENCES

Hoste, J.; Thistlethwaite, M.; and Weeks, J. "The First 1,701,936 Knots." Math. Intell., 20, 33-48, Fall 1998.

LINKS

Table of n, a(n) for n=1..16.

Eric Weisstein's World of Mathematics, Knot Symmetry.

CROSSREFS

Cf. A052415, ..., A052426.

Sequence in context: A181288 A255260 A333610 * A051800 A121432 A118968

Adjacent sequences:  A052415 A052416 A052417 * A052419 A052420 A052421

KEYWORD

nonn,hard

AUTHOR

Eric W. Weisstein

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 September 27 18:31 EDT 2021. Contains 347694 sequences. (Running on oeis4.)