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A104135
a(n) = floor(sqrt(2*Pi*n)).
2
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
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: A061373 A372306 A327705 * A354535 A276656 A373119
KEYWORD
nonn
AUTHOR
Jun Mizuki (suzuki32(AT)sanken.osaka-u.ac.jp), Mar 07 2005
STATUS
approved