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 A341614 #15 Sep 01 2025 12:22:42
%S A341614 4,6,8,9,10,14,15,16,21,27,28,32,35,39,44,45,49,50,52,57,63,64,68,69,
%T A341614 75,76,81,91,92,98,99,105,110,116,117,124,125,128,130,135,136,147,148,
%U A341614 152,153,154,164,165,170,171,172,175,182,184,188,189,190,195,207,212,225,230,231,232,236,238,242,243,244,245,248,250,255,256
%N A341614 Numbers k such that sigma(k) <= 2k < A003961(k).
%H A341614 <a href="/index/O#opnseqs">Index entries for sequences where odd perfect numbers must occur, if they exist at all</a>
%t A341614 Select[Range[256], DivisorSigma[1, #] <= 2 # <
%t A341614 Times @@ Map[#1^#2 & @@ # &, FactorInteger[#] /. {p_, e_} /; e > 0 :> {Prime[PrimePi@ p + 1], e}] &] (* _Michael De Vlieger_, Feb 22 2021 *)
%Y A341614 Intersection of A263837 and A246282 (nonabundant numbers in A246282).
%Y A341614 Union of A000396 and A341615.
%Y A341614 Union of A337372 and A341611 (see also A341610).
%Y A341614 Cf. A341612 (characteristic function), A326134 (a subsequence).
%Y A341614 Cf. also A378662, A378664.
%K A341614 nonn,changed
%O A341614 1,1
%A A341614 _Antti Karttunen_, Feb 22 2021