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 A125705 #7 Aug 18 2020 15:46:01 %S A125705 0,1,2,3,4,5,6,7,8,9,10,12,13,14,15,17,18,19,20,21,22,27,28,30,32,35, %T A125705 39,42,43,44,45,48,49,50,51,60,65,66,72,73,87,90,105 %N A125705 Genera g such that every orientation-preserving periodic automorphism of the closed orientable surface of genus g has an invariant circle. %C A125705 There are no other g with g<=10000. %H A125705 H. Geiges & D. Rattaggi, <a href="https://projecteuclid.org/euclid.em/1046889592">Periodic Automorphisms of Surfaces: Invariant Circles and Maximal Orders</a>, Experimental Mathematics, vol. 9 (2000). %K A125705 nonn,nice,more %O A125705 1,3 %A A125705 _Alex Fink_, Jan 31 2007