A303031 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A303031

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

5

1, 1, 2, 7, 43, 282, 2708, 31175, 451701, 7731154, 154264825, 3515514725, 90381251065, 2594105950453, 82437061616923, 2880328250160638, 109987239823116870, 4566153786442575091, 205144850920195457266, 9933105076082553631262, 516439104253062357469829

(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 -m2 -D5 -u; done

CROSSREFS

Cf. A289158, A303032, A303033.

Sequence in context: A050631 A235714 A146759 * A220220 A144059 A352293

Adjacent sequences: A303028 A303029 A303030 * A303032 A303033 A303034

KEYWORD

nonn

AUTHOR

Natan Arie Consigli, Jun 04 2018

EXTENSIONS

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

STATUS

approved