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 A375012 #13 Aug 08 2024 14:49:40 %S A375012 339026688000000,377975808000000,424639621324800,483184764518400, %T A375012 453984583680000 %N A375012 A cycle of length 5 when iterating x <- phi(sigma(x)). %C A375012 The first term in the sequence is the smallest member of the cycle. This is the 5-cycle with the smallest members. Similar cycles are in the crossreferences. %e A375012 phi(sigma(339026688000000)) = 377975808000000, ... phi(sigma(453984583680000)) = 339026688000000, so 339026688000000 is in the sequence. %Y A375012 Cf. A095955, A095956, A001229, A373435, A373453, A373454, A375013, A375014. %K A375012 nonn,fini,full %O A375012 1,1 %A A375012 _Jud McCranie_, Jul 27 2024