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 A135663 a(n) = floor(sqrt(n) - n^(1/4)). 12
 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,16 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 MATHEMATICA Table[Floor[n^(1/2) - n^(1/4)], {n, 100}] (* Vincenzo Librandi, Feb 18 2013 *) PROG (MAGMA) [Floor(n^(1/2)-n^(1/4)): n in [1..100]]; // Vincenzo Librandi, Feb 18 2013 CROSSREFS Cf. A000196, A048766, A134914, A135660, A135661, A135662. Sequence in context: A180258 A211663 A000195 * A090620 A151659 A057467 Adjacent sequences:  A135660 A135661 A135662 * A135664 A135665 A135666 KEYWORD nonn,easy AUTHOR Mohammad K. Azarian, Nov 25 2007 EXTENSIONS More terms from N. J. A. Sloane, Aug 08 2008 Offset changed from 0 to 1 by Vincenzo Librandi, Feb 18 2013 STATUS approved

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