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 A308599 #14 Feb 16 2025 08:33:55 %S A308599 2,8,45,301,2281,19321,181441,1874881,21168001,259459201,3432844801, %T A308599 48778329601,741015475201,11987015040001,205740767232001, %U A308599 3734717995008001,71493173047296001,1439467021504512001,30411275102208000001,672697405260840960001,15548676734256906240001 %N A308599 Number of (not necessarily maximal) cliques in the n-alternating group graph. %C A308599 The maximum size of a clique in the n-alternating graph is 3. Cliques are then triangles, edges, vertices and the empty set. - _Andrew Howroyd_, Sep 08 2019 %H A308599 Andrew Howroyd, <a href="/A308599/b308599.txt">Table of n, a(n) for n = 2..200</a> %H A308599 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/AlternatingGroupGraph.html">Alternating Group Graph</a> %H A308599 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Clique.html">Clique</a> %F A308599 a(n) = 1 + (4*n - 5)*n!/6. - _Andrew Howroyd_, Sep 08 2019 %o A308599 (PARI) a(n) = 1 + (4*n - 5)*n!/6; \\ _Andrew Howroyd_, Sep 08 2019 %Y A308599 Cf. A001710, A317527. %K A308599 nonn %O A308599 2,1 %A A308599 _Eric W. Weisstein_, Jun 09 2019 %E A308599 Offset corrected and terms a(7) and beyond from _Andrew Howroyd_, Sep 08 2019