This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A129419 #24 Jun 02 2025 16:30:32 %S A129419 1,4,49,1689,187392,46738368,20446754006,14021056991357, %T A129419 14141140657400321,20047531681346319557,38567298550226625579671, %U A129419 97861817259606311572409609,319914449561753621623849929222,1320949150506412557504787822889933,6773751604973857152218372443743552754 %N A129419 Number of isomorphism classes of connected 5-regular loopless multigraphs of order 2n. %C A129419 Initial terms computed using software at http://users.cecs.anu.edu.au/~bdm/nauty/ %H A129419 Brendan McKay and Adolfo Piperno, <a href="http://pallini.di.uniroma1.it">Nauty and Traces</a> %F A129419 Inverse Euler transform of A129420. - _Andrew Howroyd_, Mar 17 2020 %o A129419 (nauty) geng -c -d1 $[2*$n] -q | multig -r5 -u # _Natan Arie Consigli_, Dec 20 2019 %Y A129419 Column k=5 of A328682. %Y A129419 Cf. A129420, A129430, A000421, A129417, A129421, A129423, A129425, A328682. %K A129419 nonn %O A129419 1,2 %A A129419 _Brendan McKay_, Apr 15 2007 %E A129419 a(8)-a(15) from _Andrew Howroyd_, Mar 21 2020