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 A065132 #15 Mar 26 2021 06:31:17
%S A065132 2,13,134,167,2239,62268,75255,135681,439867,18139940,23671044,
%T A065132 40892256,312083956,724031017,1990127567,2144843867,2588619526,
%U A065132 7439533243,15054156002,54892225873,69959798320,79760490898,282311798922
%N A065132 Arithmetic mean of first n terms of A008472 is an integer.
%F A065132 Integers n that divide A024924(n)=A008472(1)+A008472(2)+...+A008472(n).
%F A065132 Also, integers n that divide A024934(n).
%F A065132 Prime terms are listed in A143851.
%e A065132 Sum of first 13 terms of A008472 gives A024924(13) = 65 which is divisible by n = 13, so 13 is here: 0+2+3+2+5+5+7+2+3+7+11+5+13 = 65 = 13*5 = A024924(13).
%t A065132 s=0; Do[s=s+sp[n]; If[IntegerQ[n/25000], Print[n]]; If[IntegerQ[s/n], Print[{n, s, s/n}]], {n, 2, 4000000}] where sp[n]=A008472(n).
%Y A065132 Cf. A024924, A008472.
%K A065132 nonn
%O A065132 1,1
%A A065132 _Labos Elemer_, Oct 15 2001
%E A065132 a(10)-a(19) from _Donovan Johnson_, Nov 22 2009
%E A065132 a(20)-a(23) from _Donovan Johnson_, Aug 31 2010