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 A114575 #4 Jul 21 2013 13:48:27
%S A114575 1,1,2,2,2,2,2,3,3,3,4,3,2,4,2,4,4,1,5,2,3,2,4,2,3,3,3,4,3,3,2,5,5,3,
%T A114575 7,4,3,3,4,5,2,5,4,3,6,5,3,4,4,1,4,5,5,6,4,5,6,3,4,2,4,5,7,9,3,6,7,8,
%U A114575 5,3,5,7,5,5,7,3,5,6,6,6
%N A114575 Number of distinct prime factors of floor(e^n).
%e A114575 floor(e^3) = floor(20.08553) = 20. 20 has two distinct prime factors (2 and 5), therefore a(3) = 2.
%t A114575 Table[Length[FactorInteger[Floor[E^n]]], {n, 1, 80}]
%t A114575 PrimeNu[Floor[E^Range[80]]] (* _Harvey P. Dale_, Jul 21 2013 *)
%Y A114575 Cf. A001113 [decimal expansion of e].
%K A114575 nonn
%O A114575 0,3
%A A114575 _Stefan Steinerberger_, Feb 17 2006