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 A324445 #6 Feb 28 2019 12:42:53 %S A324445 1,2,11,74,652,7069,90946,1353554,22870541,432424178,9044698456, %T A324445 207336529399,5168830168426,139221843251594,4028994710377547, %U A324445 124670425690921634,4107486007743301396,143555848444786921189,5304751937400100397626,206646474536314180818218 %N A324445 Number of labeled cyclic chord diagrams with n chords such that the minimal chord length equals one. %H A324445 Alois P. Heinz, <a href="/A324445/b324445.txt">Table of n, a(n) for n = 1..404</a> %F A324445 a(n) = A001147(n) - A003436(n). %Y A324445 Column k=1 of A324429. %Y A324445 Cf. A001147, A003436. %K A324445 nonn %O A324445 1,2 %A A324445 _Alois P. Heinz_, Feb 28 2019