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 A034885 #18 Dec 20 2023 15:11:23 %S A034885 1,3,4,7,12,15,18,28,31,39,42,60,72,91,96,124,168,195,224,234,252,280, %T A034885 360,403,480,546,576,600,744,819,868,992,1170,1344,1512,1560,1680, %U A034885 1860,1872,2016,2418,2880,3048,3224,3600,3844,4368,4914,5040,5082,5952,6045 %N A034885 Record values of sigma(n). %C A034885 RECORDS transform of A000203. %H A034885 Amiram Eldar, <a href="/A034885/b034885.txt">Table of n, a(n) for n = 1..10000</a> (terms 1..639 from T. D. Noe) %H A034885 N. J. A. Sloane, <a href="/transforms.txt">Transforms</a> (The RECORDS transform returns both the high-water marks and the places where they occur). %F A034885 a(n) = A000203(A002093(n)). %t A034885 DeleteDuplicates[DivisorSigma[1,Range[5000]],GreaterEqual] (* _Harvey P. Dale_, Dec 20 2023 *) %Y A034885 Cf. A000203, A002093, A034091. %K A034885 nonn %O A034885 1,2 %A A034885 _Erich Friedman_