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 A135660 a(n) = ceiling(sqrt(n) - n^(1/3)). 15
 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,10 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..999 MATHEMATICA Table[Ceiling[n^(1/2) - n^(1/3)], {n, 100}] (* Vincenzo Librandi, Feb 16 2013 *) PROG (MAGMA) [Ceiling(n^(1/2) - n^(1/3)): n in [1..100]]; // Vincenzo Librandi, Feb 16 2013 CROSSREFS Cf. A000196, A048766, A134914. Sequence in context: A243113 A258198 A204562 * A163858 A236362 A133502 Adjacent sequences:  A135657 A135658 A135659 * A135661 A135662 A135663 KEYWORD nonn,easy AUTHOR Mohammad K. Azarian, Nov 25 2007 EXTENSIONS Changed offset from 2 to 1 by Vincenzo Librandi, Feb 16 2013 STATUS approved

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Last modified July 30 15:06 EDT 2021. Contains 346359 sequences. (Running on oeis4.)