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 A374476 #9 Aug 06 2024 16:38:24 %S A374476 8,15,21,27,32,33,35,39,45,50,51,55,57,63,65,69,75,77,85,87,91,93,95, %T A374476 98,99,105,111,115,117,119,123,125,128,129,133,135,141,143,145,147, %U A374476 153,155,159,161,165,171,175,177,183,185,187,189,195,196,200,201,203,205,207,209,213,215,217,219,221,231,235,237 %N A374476 Composite numbers k such that the least prime dividing the sum of divisors of k is equal to the least prime not dividing k. %H A374476 Antti Karttunen, <a href="/A374476/b374476.txt">Table of n, a(n) for n = 1..12000</a> %H A374476 <a href="/index/O#opnseqs">Index entries for sequences where odd perfect numbers must occur, if they exist at all</a> %o A374476 (PARI) isA374476(n) = (!isprime(n) && A374474(n)); %Y A374476 Intersection of A002808 and A374475. %Y A374476 Cf. A000203, A020639, A053669, A374474. %Y A374476 Cf. A228058 (subsequence), and also A324534, A351458, A364286. %K A374476 nonn %O A374476 1,1 %A A374476 _Antti Karttunen_, Aug 06 2024