%I #14 Mar 18 2020 03:02:17

%S 0,1,1,9,36,571,12465,543116,35241608,3230417239,397514307014,

%T 63830872225605,13080448625309965,3358687593761378470,

%U 1063838242661288090062,410057057694777406364151,190064879184725871853627854,104825763290631293396894238206

%N Number of isomorphism classes of connected 8-regular loopless multigraphs of order n.

%C Initial terms computed using software at http://users.cecs.anu.edu.au/~bdm/nauty/

%H Brendan McKay and Adolfo Piperno, <a href="http://pallini.di.uniroma1.it">Nauty and Traces</a>

%F Inverse Euler transform of A129426. - _Andrew Howroyd_, Mar 17 2020

%o (nauty/bash) geng -c -d1 ${n} -q | multig -r8 -u # _Natan Arie Consigli_, Jun 05 2017

%Y Column k=8 of A328682.

%Y Cf. A129426, A129436, A000421, A129417, A129419, A129421, A129423, A328682.

%K nonn

%O 1,4

%A _Brendan McKay_, Apr 15 2007

%E Deleted a(0) and a(1). - _N. J. A. Sloane_, Jan 11 2020

%E a(1)=0 prepended and a(12)-a(18) from _Andrew Howroyd_, Mar 17 2020