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 A333894 #4 Apr 09 2020 14:24:40 %S A333894 1,1,4,8,26,60,184,488,1509,4468,14494,47228,163584,580489,2155219, %T A333894 8245929,32708045,133615420,562518913,2432472970,10794454457, %U A333894 49060744260,228113422904,1083584062308,5253168117841,25964917671574,130732997627332,669989546176410,3492408687398352 %N A333894 Number of unlabeled loopless multigraphs with n nodes of degree 3 or less. %F A333894 Euler transform of A243391. %Y A333894 Column k=3 of A333893. %Y A333894 Cf. A243391. %K A333894 nonn %O A333894 0,3 %A A333894 _Andrew Howroyd_, Apr 08 2020