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 A015797 #27 Jul 15 2017 11:23:47 %S A015797 14,20,54,56,234,286,456,686,735,980,1176,1224,1470,2000,3296,21645, %T A015797 34632,37496,43290,46620,62336,191616,277808,779568,1124528,4095712, %U A015797 16726016,17409376,50251776,149911936,177383296,12883623936,42932880896,295964664896 %N A015797 Numbers n such that phi(n) + 6 | sigma(n). %C A015797 a(35) > 10^12. - _Donovan Johnson_, Feb 28 2012 %e A015797 phi(14)+6 = 12, which divides sigma(14)=24, so 14 is in the sequence. %t A015797 Select[Range[100000], %t A015797 Divisible[DivisorSigma[1, #], EulerPhi[#] + 6] &] (* _David Nacin_, Feb 28 2012 *) %o A015797 (PARI) isok(n) = (sigma(n) % (eulerphi(n) + 6)) == 0; \\ _Michel Marcus_, Jul 15 2017 %Y A015797 Cf. A000010, A000203. %K A015797 nonn %O A015797 1,1 %A A015797 _Robert G. Wilson v_ %E A015797 More terms from _Jud McCranie_, Dec 25 1999 %E A015797 a(32)-a(34) from _Donovan Johnson_, Feb 28 2012