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 A135672 a(n) = floor(n - n^(2/3)). 7
 0, 0, 0, 1, 2, 2, 3, 4, 4, 5, 6, 6, 7, 8, 8, 9, 10, 11, 11, 12, 13, 14, 14, 15, 16, 17, 18, 18, 19, 20, 21, 21, 22, 23, 24, 25, 25, 26, 27, 28, 29, 29, 30, 31, 32, 33, 33, 34, 35, 36, 37, 38, 38, 39, 40, 41, 42, 43, 43, 44, 45 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 MATHEMATICA Table[Floor[n - n^(2/3)], {n, 100}] (* Vincenzo Librandi, Feb 18 2013 *) PROG (MAGMA) [Floor(n-n^(2/3)): n in [1..100]]; // Vincenzo Librandi, Feb 18 2013 (PARI) a(n)=n-sqrtnint(n^2-1, 3)-1 \\ Charles R Greathouse IV, Sep 02 2015 CROSSREFS Cf. A135660, A135661, A135662, A135663, A135664, A135665, A028391, A135668, A135669, A135670, A135671. Sequence in context: A020909 A075357 A094331 * A265133 A064506 A082774 Adjacent sequences:  A135669 A135670 A135671 * A135673 A135674 A135675 KEYWORD nonn,easy AUTHOR Mohammad K. Azarian, Nov 25 2007 EXTENSIONS Offset corrected by Mohammad K. Azarian, Nov 19 2008 STATUS approved

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Last modified June 15 15:16 EDT 2021. Contains 345049 sequences. (Running on oeis4.)