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 A129424 #7 Mar 21 2020 13:21:06 %S A129424 1,8,271,90913,165134083,861889423083,10352781874872853, %T A129424 253226977418079364874,11542716741789258789499297, %U A129424 915461016322959135074642849828 %N A129424 Number of isomorphism classes of 7-regular loopless multigraphs of order 2n. %C A129424 Initial terms computed using software at http://users.cecs.anu.edu.au/~bdm/nauty/ %F A129424 Euler transform of A129423. - _Andrew Howroyd_, Mar 21 2020 %Y A129424 Column k=7 of A333330. %Y A129424 Cf. A129423, A129435, A129416, A129418, A129420, A129422, A129426. %K A129424 nonn,more %O A129424 1,2 %A A129424 _Brendan McKay_, Apr 15 2007 %E A129424 a(7)-a(10) from _Andrew Howroyd_, Mar 21 2020