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 A074886 #8 Sep 29 2019 02:51:14
%S A074886 14,110,274,435,1298,4608,4646,5384,9214,10154,10778,11912,13035,
%T A074886 13844,15026,18698,21346,22958,25642,26846,27466,32078,34546,41164,
%U A074886 49570,77374,80438,85875
%N A074886 Numbers n such that sigma(sigma(n) - n) = phi(sigma(n) + n).
%H A074886 Amiram Eldar, <a href="/A074886/b074886.txt">Table of n, a(n) for n = 1..1000</a>
%e A074886 sigma(sigma(110)-110) = sigma(216-110) = 162; phi(sigma(110)+110) = phi(326) = 162, so 110 is a term of the sequence.
%t A074886 r = {}; Do[d = DivisorSigma[1, n]; If[DivisorSigma[1, d - n] == EulerPhi[d + n], r = Append[r, n]], {n, 1, 10^5}]; r
%Y A074886 Cf. A000010, A000203, A001065, A155085.
%K A074886 nonn
%O A074886 1,1
%A A074886 _Joseph L. Pe_, Sep 13 2002