A303031 Number of unlabeled connected loopless multigraphs with n nodes of degree 5 or less and with single or double edges.

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

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