A104135 a(n) = floor(sqrt(2*Pi*n)).

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

Offset

1,1

Links

G. C. Greubel, Table of n, a(n) for n = 1..10000

Mathematica

Table[Floor[Sqrt[2*Pi*n]], {n, 80}] (* Harvey P. Dale, Oct 08 2012 *)

Prog

(PARI) vector(80, n, floor(sqrt(2*Pi*n))) \\ G. C. Greubel, Oct 01 2018
(Magma) R:= RealField(10); [Floor(Sqrt(2*Pi(R)*n)): n in [1..80]]; // G. C. Greubel, Oct 01 2018

Crossrefs

Cf. A104135 (with ceiling).

Sequence in context: A005245 A061373 A327705 * A354535 A276656 A309250

Adjacent sequences: A104132 A104133 A104134 * A104136 A104137 A104138

Keyword

nonn

Author

Jun Mizuki (suzuki32(AT)sanken.osaka-u.ac.jp), Mar 07 2005

Status

approved