

A011279


Decimal expansion of 10th root of 10.


2



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
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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



