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%I #13 Mar 17 2020 21:33:53
%S 0,1,1,6,15,120,933,13303,252207,6450828,205475039,7936493756,
%T 363639228194,19476976825809,1205115679461426,85288127619421544,
%U 6845235025444882069,618411485467843477405,62471139399366989007575,7014991719815977343879171
%N Number of isomorphism classes of connected 6-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 A129422. - _Andrew Howroyd_, Mar 17 2020
%o (nauty/bash) geng -c -d1 ${n} -q | multig -r6 -u # _Natan Arie Consigli_, Jun 05 2017
%Y Column k=6 of A328682.
%Y Cf. A129422, A129432, A000421, A129417, A129419, A129423, A129425, A328682.
%K nonn
%O 1,4
%A _Brendan McKay_, Apr 15 2007
%E a(1)=0 prepended and a(14)-a(20) from _Andrew Howroyd_, Mar 17 2020
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