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 A383295 #12 May 15 2025 11:25:44
%S A383295 3,6,8,17,22,24,31,50,64,76,112,122,124,171,232,240,290,319,359,485,
%T A383295 521,595,696,823,947,982,1279,1313,1642,1810,1961,2090,2096,2168,2306,
%U A383295 2736,3002,3398,3638,3932,4379,4733,4913,5207,6072,6312,6583,6710,7717,7898,9165,9929,10298,11144,11568,11786,12430,14138
%N A383295 Positions of proper prime powers (A246547) in EKG-sequence.
%C A383295 Apparently also numbers k for which A265576(k) > 1 and A064413(k) is neither 2 nor 2*odd prime.
%H A383295 Antti Karttunen, <a href="/A383295/b383295.txt">Table of n, a(n) for n = 1..321</a>
%H A383295 <a href="/index/Ed#EKG">Index entries for sequences related to EKG sequence</a>.
%o A383295 (PARI) isA383295(n) = { my(x=A064413(n)); (isprimepower(x) && !isprime(x)); };
%Y A383295 Cf. A064413, A246547, A265576.
%Y A383295 Setwise difference A383294 \ A064955.
%Y A383295 Conjectured to be a subsequence of A383285.
%K A383295 nonn
%O A383295 1,1
%A A383295 _Antti Karttunen_, Apr 22 2025