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 A308054 #10 Sep 02 2022 04:58:59
%S A308054 0,1,24,259,2614,26222,262220,2622178,26221610,262215860,2622158194
%N A308054 The number of coreful abundant numbers (A308053) below 10^n.
%F A308054 a(n) ~ c * 10^n, where c = 0.0262215... is the asymptotic density of the coreful abundant numbers (see A308053). [Updated by _Amiram Eldar_, Sep 02 2022]
%e A308054 Below 10^2 there is only one coreful abundant number, 72, hence a(2) = 1.
%t A308054 f[p_, e_] := (p^(e+1)-1)/(p-1)-1; csigma[1]=1; csigma[n_] := Times @@ (f @@@ FactorInteger[n]); cpQ[n_] := csigma[n] > 2*n; s={0}; c=0; p=100; Do[If[k==p, AppendTo[s, c]; p*=10]; If[cpQ[k], c++], {k, 1, 1000001}]; s
%Y A308054 Cf. A302992, A302993, A302994, A307820, A307821, A307823, A307961, A308053.
%K A308054 nonn,more
%O A308054 1,3
%A A308054 _Amiram Eldar_, May 10 2019
%E A308054 a(11) from _Amiram Eldar_, Sep 02 2022