A011279 Decimal expansion of 10th root of 10.

1, 2, 5, 8, 9, 2, 5, 4, 1, 1, 7, 9, 4, 1, 6, 7, 2, 1, 0, 4, 2, 3, 9, 5, 4, 1, 0, 6, 3, 9, 5, 8, 0, 0, 6, 0, 6, 0, 9, 3, 6, 1, 7, 4, 0, 9, 4, 6, 6, 9, 3, 1, 0, 6, 9, 1, 0, 7, 9, 2, 3, 0, 1, 9, 5, 2, 6, 6, 4, 7, 6, 1, 5, 7, 8, 2, 5, 0, 2, 0, 2, 4, 1, 2, 1, 0, 5, 0, 9, 6, 6, 2, 7, 5, 9, 4, 6, 1, 7

Offset

1,2

Comments

This is the ratio of +1 dB (one decibel). Decibels are the principal way how power ratios are measured in electric and electronic engineering, acoustics, meteorology, optics and other engineering branches. Corresponding amplitude (rather than power) ratio is given by the square root of this constant (A011289). - Stanislav Sykora, Apr 02 2012

References

Donald Fenna, A Dictionary of Weights, Measures, and Units. Oxford University Press (2002): 61.

Links

Ivan Panchenko, Table of n, a(n) for n = 1..1000

Wikipedia, Decibel

Example

1.25892541179416721...

Maple

Digits:=100; evalf(10^(1/10)); # Wesley Ivan Hurt, Mar 26 2014

Mathematica

RealDigits[10^(1/10), 10, 100][[1]] (* Alonso del Arte, Mar 22 2014 *)

Prog

(PARI) 10^.1 \\ Charles R Greathouse IV, Mar 27 2014

Crossrefs

Cf. A011289.

Sequence in context: A250320 A250561 A131716 * A185094 A071099 A078001

Adjacent sequences: A011276 A011277 A011278 * A011280 A011281 A011282

Keyword

nonn,cons

Author

N. J. A. Sloane

Status

approved