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 A288554 #18 Jul 09 2025 04:43:34 %S A288554 1,1,1,4,45,5102 %N A288554 Number of arrangements of n circles in the affine plane with the property that every circle intersects all the other circles. %C A288554 See A250001, the main entry for this problem, for further information. %H A288554 Jon Wild, <a href="/A275923/a275923.png">Figure showing relationship between A250001, A275923, A275924, and A288554 for n=3 circles</a> %Y A288554 Cf. A250001, A275923, A275924, A288554-A288568. %K A288554 nonn,more,hard %O A288554 0,4 %A A288554 _N. J. A. Sloane_, Jun 12 2017, based on information supplied by _Jon Wild_ on Aug 31 2016