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

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A303033 Number of unlabeled connected loopless multigraphs with n nodes of degree 5 or less and with single, double or triple edges. 4
1, 1, 3, 12, 81, 535, 5274, 60684, 869238, 14595645, 284939257, 6347472749, 159579271688, 4482770916274, 139578090353236, 4783834092385411, 179397242557917048, 7322223973235272082, 323760818899998259561, 15443359560966718348986, 791699492870169123493379 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

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

PROG

(nauty/shell) for n in {1..11}; do geng -c -D5 ${n}  -q | multig  -m3 -D5 -u;

CROSSREFS

Cf. A134818, A303030, A303031, A303032.

Sequence in context: A182166 A303047 A197445 * A207322 A188227 A224608

Adjacent sequences:  A303030 A303031 A303032 * A303034 A303035 A303036

KEYWORD

nonn

AUTHOR

Natan Arie Consigli, Jun 04 2018

EXTENSIONS

a(12)-a(20) from Andrew Howroyd, Mar 20 2020

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 December 4 06:33 EST 2021. Contains 349470 sequences. (Running on oeis4.)