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 A178323 #14 Sep 08 2018 04:27:04
%S A178323 572,592,5992,599992,2014080,5999992,594637872,599999992,599999999992
%N A178323 Numbers n such that phi(reversal(n)) + sigma(reversal(n)) = n.
%C A178323 If n is in the sequence A070272 then reversal(n) is in this sequence. 10 divides all other terms of the sequence. 2014080 is the only known such term.
%C A178323 If p=6*10^n-1 is a prime greater than 5 then reversal(5*p) is in the sequence, see comment lines of A070272.
%C A178323 There is no further term up to 10^9.
%C A178323 10^12 < a(10) <= 1442827967760. - _Giovanni Resta_, Sep 04 2018
%e A178323 2014080 = phi(804102) + sigma(804102), so 2014080 is in the sequence.
%t A178323 r[n_]:=FromDigits[Reverse[IntegerDigits[n]]];
%t A178323 Do[If[EulerPhi[r[n]]+DivisorSigma[1,r[n]]==n,Print[n]],{n,1000000000}]
%Y A178323 Cf. A000010, A000203, A004086, A070272, A178324, A178325.
%K A178323 nonn,base,more
%O A178323 1,1
%A A178323 _Farideh Firoozbakht_, May 28 2010
%E A178323 a(9) from _Giovanni Resta_, Sep 04 2018