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 A285995 #28 May 20 2017 22:19:25 %S A285995 0,0,1,10,164 %N A285995 Number of arrangements of n circles in the affine plane such that at least two of the circles meet. %C A285995 A subset the arrangements of n circles described in A250001, which is the main entry for this sequence. %C A285995 See also the comments related to A000081 from Benoit Jubin and N. J. A. Sloane in A250001. %F A285995 a(n) = A250001(n) - A000081(n+1). %Y A285995 Row sums of A261070 except its column k = 0. %Y A285995 Cf. A000081, A250001. %K A285995 nonn,bref,hard,more %O A285995 0,4 %A A285995 _Omar E. Pol_, May 17 2017