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 A059118 #20 Feb 08 2015 10:30:00
%S A059118 27,1615,1885,218984,4218475,312016315,746314601,1125845307,
%T A059118 1132343549,1296114929,9016730984,303419868239,1197056419121,
%U A059118 2065971192041,2948269852109,4562970154601
%N A059118 Composite solutions to sigma(x)+8 = sigma(x+8).
%C A059118 a(17) > 10^13. - _Giovanni Resta_, Jul 11 2013
%D A059118 The first 4 terms were found by _Labos Elemer_, see A015915.
%e A059118 sigma(27)+8 = 48 = sigma(27+8), so 27 is in the sequence.
%t A059118 ta={{0}};Do[If[Equal[DivisorSigma[1, n+8] -DivisorSigma[1, n]-8, 0]&&!PrimeQ[n], Print[n]; ta=Append[ta, n]], {n, 1000000000, 1300000000}]; ta=Delete[ta, 1] (* _Labos Elemer_, Jan 10 2005 *)
%Y A059118 Cf. A015915.
%K A059118 nonn,more
%O A059118 1,1
%A A059118 _Jud McCranie_, Jan 06 2001
%E A059118 a(8)-a(10) terms from _Labos Elemer_, Jan 10 2005
%E A059118 Offset corrected and a(11) added by _Donovan Johnson_, Dec 07 2008
%E A059118 a(12)-a(16) from _Giovanni Resta_, Jul 11 2013