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 A083256 #17 Feb 23 2025 02:40:35
%S A083256 1,4,6,8,4,6,12,6,6,16,12,12,6,6,24,4,6,8,12,30,32,6,6,6,36,6,6,24,30,
%T A083256 12,12,6,48,4,12,6,12,24,6,24,6,6,60,6,12,64,6,30,12,6,30,72,6,12,12,
%U A083256 6,30,48,16,6,60,6,6,6,24,60,6,12,6,6,6,96,12,12,36,30,24,30,6,72,30,6,48
%N A083256 a(n) = A046523(n-th nonprime number) = A046523(A018252(n)).
%H A083256 Amiram Eldar, <a href="/A083256/b083256.txt">Table of n, a(n) for n = 1..10000</a>
%t A083256 f[n_] := Module[{e = ReverseSort[FactorInteger[n][[;; , 2]]]}, Times @@ (Prime[Range[Length[e]]]^e)]; f[1] = 1; f /@ Select[Range[120], !PrimeQ[#] &] (* _Amiram Eldar_, Feb 22 2025 *)
%Y A083256 Cf. A007395, A000040, A002808, A018252, A046523, A071364, A083257.
%K A083256 nonn
%O A083256 1,2
%A A083256 _Labos Elemer_, May 09 2003
%E A083256 Corrected by _Ray Chandler_, Aug 01 2004