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 A387710 #10 Sep 06 2025 13:55:34
%S A387710 1,2,3,5,7,9,10,11,13,14,15,17,19,21,22,23,25,26,29,31,33,34,35,37,38,
%T A387710 39,41,43,46,47,49,51,53,55,57,58,59,61,62,65,67,69,71,73,74,75,77,79,
%U A387710 82,83,85,86,87,89,91,93,94,95,97,98,99,101,103,105,106,107,109,110,111,113,115,117,118,119,121,122,123,125
%N A387710 Numbers k for which A003959(k) < 2*k, where A003959 is multiplicative with a(p^e) = (p+1)^e.
%H A387710 Antti Karttunen, <a href="/A387710/b387710.txt">Table of n, a(n) for n = 1..10000</a>
%o A387710 (PARI)
%o A387710 A003959(n) = { my(f = factor(n)); for(i=1, #f~, f[i, 1]++); factorback(f); };
%o A387710 is_A387710(n) = (A003959(n)<(2*n));
%Y A387710 Cf. A003959, A387711.
%Y A387710 Subsequence of A005100.
%Y A387710 Subsequences: A000040, A001358\{4, 6}, A246281.
%Y A387710 Positions of 0's in A387715.
%K A387710 nonn,new
%O A387710 1,2
%A A387710 _Antti Karttunen_, Sep 06 2025