A121275 -id:A121275 - cp's OEIS frontend

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

Mohammad K. Azarian, Aug 30 2006

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

Cf. A121275, A121276.

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

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

A121855 a(n) = ceiling(Pi*sqrt(n)).

Original entry on oeis.org

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

Offset: 0

Mohammad K. Azarian, Aug 30 2006

Vincenzo Librandi, Table of n, a(n) for n = 0..1000 (indices changed and term 1000 added by Ivan Panchenko)

Cf. A121275, A121276.

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

Offset corrected by Ivan Panchenko, Nov 13 2013

A121856 a(n) = Floor(e*sqrt(n)).

Original entry on oeis.org

0, 2, 3, 4, 5, 6, 6, 7, 7, 8, 8, 9, 9, 9, 10, 10, 10, 11, 11, 11, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18, 18, 19, 19, 19, 19, 19, 19, 20, 20, 20, 20, 20, 21, 21, 21, 21, 21, 21, 22, 22, 22, 22, 22, 22, 23, 23

Offset: 0

Mohammad K. Azarian, Aug 30 2006

nonn

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

Cf. A121275, A121276.

[Floor(Exp(1)*Sqrt(n)): n in [0..50]]; // G. C. Greubel, Oct 28 2017

Floor[E Sqrt[Range[0,80]]] (* Harvey P. Dale, May 16 2012 *)

for(n=0,50, print1(floor(exp(1)*sqrt(n)), ", ")) \\ G. C. Greubel, Oct 28 2017

Offset corrected by Harvey P. Dale, May 16 2012

cp's OEIS Frontend

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

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A121855 a(n) = ceiling(Pi*sqrt(n)).

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A121856 a(n) = Floor(e*sqrt(n)).

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