A011289 Decimal expansion of 20th root of 10.

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

Offset

1,3

Comments

In many engineering branches, ratio of two "field" amplitudes corresponding to 1 dB power ratio. For a more detailed description, see A011279. - Stanislav Sykora, Apr 02 2012

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Mathematica

RealDigits[N[10^(1/20), 200]][[1]] (* Vladimir Joseph Stephan Orlovsky, Jan 25 2012 *)
RealDigits[Surd[10, 20], 10, 120][[1]] (* Harvey P. Dale, Jul 30 2023 *)

Prog

(PARI) sqrtn(10, 20) \\ Charles R Greathouse IV, Apr 14 2014

Crossrefs

Cf. A011279.

Sequence in context: A105929 A065600 A029583 * A288387 A225678 A141720

Adjacent sequences: A011286 A011287 A011288 * A011290 A011291 A011292

Keyword

nonn,cons

Author

N. J. A. Sloane

Status

approved