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 A065388 #19 Mar 22 2025 04:42:32
%S A065388 2,4,6,9,10,14,19,22,32,39,45,50,68,80,103,106,108,140,144,184,219,
%T A065388 248,258,284,316,392,451,528,594,624,672,808,816,915,948,955,1088,
%U A065388 1266,1440,1640,1704,1824,1843,2020,2031,2176,2208,2610,3072,3304,3512,3888
%N A065388 Record values for sigma(m) + phi(m): sum of sigma and totient is larger than for any previous number.
%H A065388 Amiram Eldar, <a href="/A065388/b065388.txt">Table of n, a(n) for n = 1..1288</a> (terms 1..500 from Harry J. Smith)
%F A065388 a(n) = sigma(A015702(n)) + phi(A015702(n));
%F A065388 a(n) = A000203(A015702(n)) + A000010(A015702(n)).
%F A065388 a(n) = A065387(A015702(n)). - _Amiram Eldar_, Mar 22 2025
%o A065388 (PARI) { n=r=0; for (m=1, 10^9, x=sigma(m) + eulerphi(m); if (x > r, r=x; write("b065388.txt", n++, " ", x); if (n==500, return)) ) } \\ _Harry J. Smith_, Oct 17 2009
%Y A065388 Cf. A000010, A000203, A065387, A015702.
%K A065388 nonn
%O A065388 1,1
%A A065388 _Labos Elemer_, Nov 05 2001