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!)
A345218 Number of labeled triangle-free connected simple graphs on n vertices. 3
1, 1, 3, 19, 207, 3571, 93243, 3603139, 203658087, 16725737971, 1985745828483, 339119822487139, 82867477502576847, 28816562818537878931, 14182270437347915240523, 9825699599254424454332419 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
LOG transform of A213434.
Labeled version of A024607.
LINKS
Table of n, a(n) for n=1..16.
CROSSREFS
Cf. A024607, A213434.
Sequence in context: A180563 A294330 A079144 * A049056 A204262 A165356
Adjacent sequences: A345215 A345216 A345217 * A345219 A345220 A345221
KEYWORD
nonn,hard
AUTHOR
Brendan McKay, Jun 11 2021
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 17 10:20 EDT 2024. Contains 372594 sequences. (Running on oeis4.)