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 A015799 #8 Dec 04 2021 17:01:45 %S A015799 22,44,60,84,120,132,135,140,156,204,228,231,270,276,348,372,375,444, %T A015799 462,492,496,516,525,532,564,636,660,700,708,726,732,750,756,804,852, %U A015799 876,920,935,948,996,1050,1068,1164,1212,1236,1248,1284 %N A015799 phi(n) + 8 | sigma(n). %t A015799 Select[Range[2000],Divisible[DivisorSigma[1,#],EulerPhi[#]+8]&] (* _Harvey P. Dale_, Dec 04 2021 *) %o A015799 (PARI) is(n)=!(sigma(n)%eulerphi(n+8)) \\ _Charles R Greathouse IV_, Sep 25 2012 %K A015799 nonn %O A015799 1,1 %A A015799 _Robert G. Wilson v_