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A121855 Ceiling(Pi*(n^(1/2))). 17
0, 4, 5, 6, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 13, 14, 14, 15, 15, 15, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 22, 22, 22, 22, 22, 23, 23, 23, 23, 24, 24, 24, 24, 24, 25, 25, 25, 25, 25, 26, 26, 26, 26, 26, 27, 27, 27 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

MATHEMATICA

Table[Ceiling[Pi Sqrt[n]], {n, 0, 100}] (* Vincenzo Librandi, Feb 21 2013 *)

CROSSREFS

Cf. A121275, A121276.

Sequence in context: A067471 A102691 A014553 * A178053 A090925 A143836

Adjacent sequences:  A121852 A121853 A121854 * A121856 A121857 A121858

KEYWORD

nonn,easy

AUTHOR

Mohammad K. Azarian, Aug 30 2006

EXTENSIONS

Corrected the first offset. - Mohammad K. Azarian, Nov 19 2008

STATUS

approved

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Last modified May 24 18:33 EDT 2013. Contains 225630 sequences.