OFFSET
0,1
COMMENTS
a(n)>=1 because between n and (n+1)^2 there is always at least one cubic number.
a(6)=2 because between 5 and 6^2 there are two cubic numbers: 8 and 27
MATHEMATICA
f[n_] := Floor[(n + 1)^(2/3)] - Floor[n^(1/3)] + If[ IntegerQ[n^(1/3)], 1, 0]; Table[ f[n], {n, 0, 84}] (* Robert G. Wilson v, Apr 24 2005 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Giovanni Teofilatto, Apr 23 2005
EXTENSIONS
More terms from Robert G. Wilson v, Apr 24 2005
STATUS
approved