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 A374482 #13 Jul 10 2024 09:36:24 %S A374482 1,3,7,17,23,29,31,47,53,71,83,89,97,107,127,139,149,167,179,191,199, %T A374482 233,239,241,269,293,337,349,359,373,383,419,431,449,461,479,499,569, %U A374482 571,577,587,599,643,647,701,719,769,809,839,857,863,881,967,971,1013,1039,1049,1091,1151,1187,1217,1223,1231,1249,1279 %N A374482 Indices of records in A347381, where A347381 is the distance from n to the nearest common ancestor of n and sigma(n) in the Doudna-tree (A005940). %C A374482 Most likely, all terms are primes after the initial 1. Mersenne primes (A000668) are a subsequence. %H A374482 Antti Karttunen, <a href="/A374482/b374482.txt">Table of n, a(n) for n = 1..18144</a> %H A374482 <a href="/index/Si#SIGMAN">Index entries for sequences related to sigma(n)</a> %Y A374482 Cf. A000668 (subsequence), A005940, A347381, A374483 (record values). %Y A374482 Cf. also A374481. %K A374482 nonn %O A374482 1,2 %A A374482 _Antti Karttunen_, Jul 09 2024