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 A324721 #9 Mar 12 2019 22:23:34 %S A324721 2,3,4,5,6,7,8,10,11,12,13,14,15,16,17,18,19,20,22,23,24,26,27,28,29, %T A324721 30,31,32,33,34,36,37,38,40,41,42,43,44,45,46,47,48,50,51,52,53,54,56, %U A324721 58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,78,79,80,82,83,84,86,88,89,90,92,93,94,96,97,98,100 %N A324721 Positions of positive terms in A323244; numbers n for which 2*A156552(n) > A323243(n). %C A324721 These correspond to deficient numbers as this is sequence A005940(1+A005100(n)) sorted into ascending order. Subsequence of A324720. %H A324721 Antti Karttunen, <a href="/A324721/b324721.txt">Table of n, a(n) for n = 1..7676</a> (based on Hans Havermann's factorization of A156552) %H A324721 <a href="/index/Pri#prime_indices">Index entries for sequences computed from indices in prime factorization</a> %H A324721 <a href="/index/Si#SIGMAN">Index entries for sequences related to sigma(n)</a> %Y A324721 Cf. A005100, A005940, A156552, A323243, A323244, A324732 (characteristic function). %Y A324721 Cf. A324551, A324201, A324720. %K A324721 nonn %O A324721 1,1 %A A324721 _Antti Karttunen_, Mar 12 2019