A303033 Number of unlabeled connected loopless multigraphs with n nodes of degree 5 or less and with single, double or triple edges.

1, 1, 3, 12, 81, 535, 5274, 60684, 869238, 14595645, 284939257, 6347472749, 159579271688, 4482770916274, 139578090353236, 4783834092385411, 179397242557917048, 7322223973235272082, 323760818899998259561, 15443359560966718348986, 791699492870169123493379

Offset: 0

Author

Natan Arie Consigli, Jun 04 2018

Keywords

• nonn

Crossrefs

Cf. A134818, A303030, A303031, A303032.

Programs

nauty

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

Extensions

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