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 A333895 #4 Apr 10 2020 14:43:05 %S A333895 1,1,5,14,61,243,1228,6684,42681,304569,2445296,21676143,210409238, %T A333895 2213794888,25064493886,303468325469,3909518220091,53364222428953, %U A333895 769009695515272,11663042823897054,185651491398956596,3094082786005252494,53871873427160960819 %N A333895 Number of unlabeled loopless multigraphs with n nodes of degree 4 or less. %F A333895 Euler transform of A289157. %Y A333895 Column k=4 of A333893. %Y A333895 Cf. A289157. %K A333895 nonn %O A333895 0,3 %A A333895 _Andrew Howroyd_, Apr 08 2020