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

Author

N. J. A. Sloane

Keywords

• nonn
• cons

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

Examples

			1.25892541179416721...
		

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
• Index entries for algebraic numbers, degree 10.

Crossrefs

Cf. A011289.

Programs

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 *)

PARI

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