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Number of cubes <= n-th prime.
4

%I #8 Nov 21 2013 12:48:39

%S 2,2,2,2,3,3,3,3,3,4,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,6,6,6,6,

%T 6,6,6,6,6,6,6,6,6,6,6,6,6,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,

%U 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,9

%N Number of cubes <= n-th prime.

%H Vincenzo Librandi, <a href="/A104147/b104147.txt">Table of n, a(n) for n = 0..1000</a>

%t Floor[Power[#, (3)^-1]]+1&/@Prime[Range[100]] (* _Harvey P. Dale_, Feb 01 2012 *)

%K easy,nonn

%O 0,1

%A _Giovanni Teofilatto_, Mar 08 2005