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 A384607 #14 Jun 16 2025 18:44:01 %S A384607 1,2,5,14,15,51,67,77,83,87,97,101,107,111,125,131,145,149,155,159, %T A384607 173,183,193,203,207,217,227,231,245,265,267,269,275,279,289,293,323, %U A384607 327,341,347,365,371,385,395,399,413,423,433,447,457,461,467,491,504,515 %N A384607 Possible values for the number of groups of order equal to a prime power, in order of size. %C A384607 Possible values of A098885, ordered by size. %C A384607 This sequence is the same regardless of whether 1 is considered a prime power or not (see A000961 for discussion on this) as A000001(1)=A000001(p)=1 for all p. %H A384607 Robin Jones, <a href="/A384607/b384607.txt">Table of n, a(n) for n = 1..180</a> %e A384607 1 is in this sequence because A000001(2) = 1. %e A384607 2 is in this sequence because A000001(2^2) = 2. %e A384607 5 is in this sequence because A000001(2^3) = 5. %e A384607 3 is not in this sequence as no prime power p^k has A000001(p^k)=3. %Y A384607 Cf. A000001, A098885, A384606. %K A384607 nonn %O A384607 1,2 %A A384607 _Robin Jones_, Jun 04 2025