%I #6 Jun 24 2017 16:10:21
%S 2,4,4,4,5,5,5,5,6,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8,8,9,9,10,11,11,11,11,
%T 11,11,11,11,12,12,12,12,12,12,12,12,12,12,12,12,12,13,13,13,13,13,13,
%U 13,13,13,13,13,13,13,13,13,15,15,15,15,15,15
%N a(n) = |{k^2: 0 <= k^2 <= n}| + |{k^3: 0 <= k^3 <= n}|.
%F a(n) = 2 + floor(n^(1/2)) + floor(n^(1/3)).
%Y Cf. A104055.
%K nonn
%O 0,1
%A _Giovanni Teofilatto_, Mar 02 2005
%E Better definition from _Emeric Deutsch_, Mar 25 2005