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A010781 Decimal expansion of 19th root of 2. 1
1, 0, 3, 7, 1, 5, 5, 0, 4, 4, 4, 4, 6, 1, 9, 1, 9, 8, 6, 1, 3, 8, 7, 2, 5, 0, 2, 5, 5, 5, 6, 3, 8, 7, 2, 8, 0, 9, 9, 0, 1, 2, 4, 0, 1, 7, 9, 7, 6, 5, 1, 2, 3, 5, 7, 9, 9, 5, 2, 8, 7, 3, 9, 8, 0, 0, 7, 6, 8, 7, 3, 5, 3, 8, 1, 5, 1, 8, 7, 4, 2, 0, 0, 9, 3, 6, 0, 0, 6, 0, 1, 3, 8, 8, 6, 2, 0, 2, 0 (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/(19*k + 18)). - Amiram Eldar, Aug 01 2020

MATHEMATICA

RealDigits[N[2^(1/19), 100]][[1]] (* Vincenzo Librandi, Apr 03 2013 *)

PROG

(PARI) sqrtn(2, 19) \\ Charles R Greathouse IV, Apr 15 2014

CROSSREFS

Sequence in context: A016664 A197758 A071792 * A019806 A199589 A080172

Adjacent sequences:  A010778 A010779 A010780 * A010782 A010783 A010784

KEYWORD

nonn,cons

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified January 22 03:32 EST 2021. Contains 340360 sequences. (Running on oeis4.)