A010771 Decimal expansion of 9th root of 2.

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

Offset

1,3

Links

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

Formula

Equals Product_{k>=0} (1 + (-1)^k/(9*k + 8)). - Amiram Eldar, Jul 29 2020

Mathematica

RealDigits[N[2^(1/9), 100]][[1]] (* Vincenzo Librandi, Apr 02 2013 *)

Prog

(PARI) sqrtn(2, 9) \\ Charles R Greathouse IV, Apr 15 2014

Crossrefs

Sequence in context: A279418 A157244 A154191 * A246560 A199064 A280653

Adjacent sequences: A010768 A010769 A010770 * A010772 A010773 A010774

Keyword

nonn,cons

Author

N. J. A. Sloane

Status

approved