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 A112764 #14 Sep 08 2022 08:45:23
%S A112764 1,2,3,2,5,3,2,3,5,3,5,2,3,5,3,5,3,5,2,3,5,5,3,5,3,5,2,3,5,5,3,5,3,5,
%T A112764 3,5,5,2,5,3,5,5,3,5,3,5,3,5,5,3,5,2,5,3,5,5,3,5,5,3,5,5,3,5,5,3,5,2,
%U A112764 5,3,5,5,5,3,5,5,3,5,3,5,5,3,5,5,3,5,2,5,5,3,5,5,5,5,3,5,5,3,5,3,5,5,3,5,5
%N A112764 Greatest prime factor of the n-th 5-smooth number.
%H A112764 Amiram Eldar, <a href="/A112764/b112764.txt">Table of n, a(n) for n = 1..10000</a>
%F A112764 a(n) = A006530(A051037(n));
%F A112764 A112763(n) <= a(n) <= 5.
%t A112764 Reap[Do[p = FactorInteger[n][[-1, 1]]; If[p < 7, Sow[p]], {n, 1, 2000}] ][[2, 1]] (* _Jean-François Alcover_, Dec 17 2017 *)
%o A112764 (Magma) [1] cat [Max(PrimeDivisors(k)): k in [2..1500]| PrimeDivisors(k) subset [2, 3, 5]]; // _Marius A. Burtea_, Feb 07 2020
%Y A112764 Cf. A051037, A006530, A086411, A112756, A112763.
%K A112764 nonn
%O A112764 1,2
%A A112764 _Reinhard Zumkeller_, Sep 18 2005