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A010782 Decimal expansion of 20th root of 2. 1
1, 0, 3, 5, 2, 6, 4, 9, 2, 3, 8, 4, 1, 3, 7, 7, 5, 0, 4, 3, 4, 7, 7, 8, 8, 1, 9, 4, 2, 1, 1, 2, 4, 6, 1, 9, 7, 7, 2, 9, 6, 1, 0, 9, 1, 0, 3, 2, 4, 6, 3, 0, 1, 5, 7, 9, 7, 6, 6, 9, 8, 3, 2, 3, 0, 2, 2, 8, 2, 5, 5, 1, 4, 0, 1, 5, 9, 9, 1, 6, 4, 4, 7, 4, 4, 2, 2, 1, 7, 2, 5, 3, 3, 4, 1, 5, 2, 0, 2 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..5000

FORMULA

Equals Product_{k>=0} (1 + (-1)^k/(20*k + 19)). - Amiram Eldar, Aug 01 2020

MATHEMATICA

RealDigits[N[2^(1/20), 100]][[1]] (* Vladimir Joseph Stephan Orlovsky, Jan 25 2012 *)

RealDigits[Surd[2, 20], 10, 120][[1]] (* Harvey P. Dale, Feb 06 2020 *)

PROG

(PARI) sqrtn(2, 20) \\ Charles R Greathouse IV, Apr 15 2014

CROSSREFS

Sequence in context: A198099 A016657 A302793 * A333111 A139584 A064790

Adjacent sequences:  A010779 A010780 A010781 * A010783 A010784 A010785

KEYWORD

nonn,cons

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified November 28 07:44 EST 2020. Contains 338702 sequences. (Running on oeis4.)