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 A382284 #8 Mar 21 2025 15:28:28 %S A382284 1,1,1,1,2,3,7,13,31,60,146,320,787,1864,4654,11526,29318,74632, %T A382284 192868,500487,1310826 %N A382284 Number of unlabeled connected graphs with n vertices which are planar squares. %C A382284 See A382180 for a definition of a square graph. %H A382284 Frank Harary, Richard M. Karp, and William T. Tutte, <a href="https://doi.org/10.1016/S0021-9800(67)80050-4">A Criterion for Planarity of the Square of a Graph</a>, J. Comb. Th., 2, 1967, pp. 395-405. %Y A382284 Cf. A381961, A382180. %K A382284 nonn,more,hard %O A382284 0,5 %A A382284 _Brendan McKay_ and _Sean A. Irvine_, Mar 20 2025 %E A382284 a(16)-a(20) from _Brendan McKay_, Mar 21 2025