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 A152446 #8 Aug 27 2015 00:01:05
%S A152446 1,2,2,3,5,13,61,787,47981,37761019,1811811452611,
%T A152446 68415846686461570603,123956614566609409301849965194431,
%U A152446 8480596737961958410971738003633556174455988528911421
%N A152446 a(0) = 1. a(1) = 2. For n >= 2, a(n) = the largest prime <= a(n-1)*a(n-2).
%t A152446 a = {1, 2}; Do[AppendTo[a, Prime[PrimePi[a[[ -1]]*a[[ -2]]]]], {9}]; a (* _Stefan Steinerberger_, Dec 06 2008 *)
%Y A152446 Cf. A152445.
%K A152446 nonn
%O A152446 0,2
%A A152446 _Leroy Quet_, Dec 04 2008
%E A152446 Extended by _Ray Chandler_ and _Stefan Steinerberger_, Dec 05 2008