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 A372174 #5 Apr 24 2024 12:43:10 %S A372174 0,0,0,1,1,5,16,79,424,3098,28616 %N A372174 Number of unlabeled simple graphs covering n vertices with a unique triangle. %C A372174 The labeled version is A372171. %H A372174 Gus Wiseman, <a href="/A372174/a372174.png">The a(3) = 1 through a(6) = 16 covering graphs with a unique triangle</a>. %F A372174 First differences of A372194. %Y A372174 The non-covering version is column k = 1 of A263340, labeled A372170. %Y A372174 Case of A370167 with a unique triangle, labeled A054548. %Y A372174 For no triangles we have A372169, labeled A372168 (non-covering A213434). %Y A372174 The labeled version is A372171, column k = 1 of A372167. %Y A372174 Column k = 1 of A372173, labeled A372167. %Y A372174 For cycles (not just triangles) we have A372191, labeled A372195. %Y A372174 The non-covering version is A372194, labeled A372172. %Y A372174 A000088 counts unlabeled graphs, labeled A006125. %Y A372174 A001858 counts acyclic graphs, unlabeled A005195. %Y A372174 A002494 counts unlabeled covering graphs, labeled A006129. %Y A372174 A372176 counts labeled graphs by directed cycles, covering A372175. %Y A372174 Cf. A000055, A053530, A137917, A137918, A140637, A144958, A370169. %K A372174 nonn,more %O A372174 0,6 %A A372174 _Gus Wiseman_, Apr 24 2024