A121854 a(n) = floor(Pi*(sqrt(n))).

0, 3, 4, 5, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 12, 13, 13, 14, 14, 14, 15, 15, 15, 16, 16, 16, 16, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23, 23, 24, 24, 24

Offset

0,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

Mathematica

Table[Floor[\[Pi] Sqrt[n]], {n, 0, 65}]  (* Harvey P. Dale, Apr 22 2011 *)

Crossrefs

Cf. A121275, A121276.

Sequence in context: A242374 A225179 A121857 * A196119 A225852 A198458

Adjacent sequences: A121851 A121852 A121853 * A121855 A121856 A121857

Keyword

nonn,easy

Author

Mohammad K. Azarian, Aug 30 2006

Extensions

Offset corrected and b-file updated by Ivan Panchenko, Nov 13 2013

Status

approved