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 A348816 #5 Nov 01 2021 22:30:53 %S A348816 0,1,15,4790,4151415,6619291247,17510518983528,71631394311300461, %T A348816 429426878302882412435,3616596939726424941979785 %N A348816 a(n) = number of loopless diagrams by number of K_4 up to rotational symmetry. %H A348816 Evgeniy Krasko, Igor Labutin, and Alexander Omelchenko, <a href="https://arxiv.org/abs/1709.03218">Enumeration of Labelled and Unlabelled Hamiltonian Cycles in Complete k-partite Graphs</a>, arXiv:1709.03218 [math.CO], 2017. See Appendix Table 3. %Y A348816 Cf. A190830, A348815, A348817; A007474, A348814, A348819, A348822. %K A348816 nonn,more %O A348816 1,3 %A A348816 _Michael De Vlieger_, Nov 01 2021