The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A067768 Number of alternating link diagrams with n crossings, 3 connected components and two external legs. 1
22, 728, 14884, 244908, 3575045, 48517524, 628013796, 7871666088, 96451145091, 1162484964230, 13840075278704, 163246693686684, 1911737961254907, 22262254374655710 (list; graph; refs; listen; history; text; internal format)
OFFSET
6,1
LINKS
Table of n, a(n) for n=6..19.
J. L. Jacobsen and P. Zinn-Justin, A Transfer Matrix approach to the Enumeration of Colored Links, J. Knot Theory, 10 (2001), 1233-1267.
CROSSREFS
A column of A062038.
Sequence in context: A262417 A027409 A159189 * A181181 A160037 A278440
Adjacent sequences: A067765 A067766 A067767 * A067769 A067770 A067771
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Feb 09 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 14 01:40 EDT 2024. Contains 372528 sequences. (Running on oeis4.)