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A062838 Cubes of squarefree numbers. 5
1, 8, 27, 125, 216, 343, 1000, 1331, 2197, 2744, 3375, 4913, 6859, 9261, 10648, 12167, 17576, 24389, 27000, 29791, 35937, 39304, 42875, 50653, 54872, 59319, 68921, 74088, 79507, 97336, 103823, 132651, 148877, 166375, 185193, 195112, 205379, 226981, 238328 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A055229(a(n)) = A005117(n) and A055229(m) < A005117(n) for m < a(n). - Reinhard Zumkeller, Apr 09 2010

LINKS

Vincenzo Librandi and T. D. Noe, Table of n, a(n) for n = 1..1000

FORMULA

a(n) = A005117(n)^3. - R. J. Mathar, Dec 03 2015

MATHEMATICA

Select[Range[70], SquareFreeQ]^3 (* Harvey P. Dale, Jul 20 2011 *)

PROG

(PARI) for(n=1, 35, if(issquarefree(n), print(n*n^2)))

(PARI) a(n) = my(m, c); if(n<=1, n==1, c=1; m=1; while(c<n, m++; if(issquarefree(m), c++)); m^3); \\  Altug Alkan, Dec 03 2015

CROSSREFS

Cf. A005117.

Sequence in context: A030160 A030162 A153147 * A240859 A277047 A046452

Adjacent sequences:  A062835 A062836 A062837 * A062839 A062840 A062841

KEYWORD

nonn,easy

AUTHOR

Jason Earls (zevi_35711(AT)yahoo.com), Jul 21 2001

EXTENSIONS

More terms from Dean Hickerson, Jul 24 2001

More terms from Vladimir Joseph Stephan Orlovsky, Aug 15 2008

STATUS

approved

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Last modified July 24 16:44 EDT 2017. Contains 289775 sequences.