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 A129420 #18 Mar 21 2020 16:17:53 %S A129420 1,5,54,1753,189341,46935710,20494522535,14041749098602, %T A129420 14155266802426836,20061744131278672638,38587417589460488631726, %U A129420 97900485588988429336271590,320012505326477694925887757141,1321269556386383657509085883067690,6775074159053505093089897813890701467 %N A129420 Number of isomorphism classes of 5-regular loopless multigraphs of order 2n. %C A129420 Initial terms computed using software at http://users.cecs.anu.edu.au/~bdm/nauty/ %F A129420 Euler transform of A129419. - _Andrew Howroyd_, Mar 17 2020 %Y A129420 Column k=5 of A333330. %Y A129420 Cf. A129419, A129431, A129416, A129418, A129422, A129424, A129426. %K A129420 nonn %O A129420 1,2 %A A129420 _Brendan McKay_, Apr 15 2007 %E A129420 a(8)-a(15) from _Andrew Howroyd_, Mar 21 2020