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 A328387 #13 May 07 2025 11:54:35
%S A328387 1,3,15,25,75,105,147,175,343,385,525,539,625,735,825,1029,1155,1225,
%T A328387 1331,1375,1617,1815,2695,3003,3025,3675,3773,3993,4375,5005,5145,
%U A328387 5577,5775,6655,6825,8085,8125,8281,8575,9075,9555,9625,10725,11011,11319,12675,12705,13013,13377,15015,15379,15925,17303,17745,17787,17875
%N A328387 Numbers k such that A276086(k) is a multiple of k.
%C A328387 All terms are odd. Of the first 3003 terms, 1709 are multiples of five.
%H A328387 Antti Karttunen, <a href="/A328387/b328387.txt">Table of n, a(n) for n = 1..3003</a>
%o A328387 (PARI)
%o A328387 A276086(n) = { my(m=1, p=2); while(n, m *= (p^(n%p)); n = n\p; p = nextprime(1+p)); (m); };
%o A328387 isA328387(n) = (0==(A276086(n)%n));
%Y A328387 Cf. A276086, A324198.
%Y A328387 Indices of 0's in A328386. Indices of 1's in A351250.
%Y A328387 Subsequence of A048103 and of A358226.
%Y A328387 Cf. also A370114, A358231.
%K A328387 nonn
%O A328387 1,2
%A A328387 _Antti Karttunen_, Oct 15 2019