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 A078118 #10 Feb 16 2019 06:54:16 %S A078118 1,6,22,25,28,30,40,42,46,52,58,60,68,70,72,78,87,88,96,98,102,105, %T A078118 106,112,114,122,126,128,130,133,138,145,148,150,156,162,166,172,178, %U A078118 182,190,192,196,198,212,213,217,218,222,225,226,228,232,238,240,250,262 %N A078118 n+1 does not divide sigma(n!). %H A078118 Vaclav Kotesovec, <a href="/A078118/b078118.txt">Table of n, a(n) for n = 1..8822</a> %H A078118 Vaclav Kotesovec, <a href="/A078118/a078118.jpg">Plot of a(n)/n for n = 1..8000</a> %F A078118 a(n) seems to be asymptotic to c*n with c=4.8.... %t A078118 Select[Range[300], Not[Divisible[DivisorSigma[1, #!], # + 1]] &] (* _Vaclav Kotesovec_, Feb 16 2019 *) %Y A078118 Cf. A062569. %K A078118 nonn %O A078118 1,2 %A A078118 _Benoit Cloitre_, Dec 05 2002