A010770 - OEIS

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A010770

Decimal expansion of 8th root of 2.

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

(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/(8*k + 7)). - Amiram Eldar, Jul 29 2020

MATHEMATICA

RealDigits[N[2^(1/8), 100]][[1]] (* Vincenzo Librandi, Apr 02 2013 *)

PROG

(PARI) sqrtn(2, 8) \\ Charles R Greathouse IV, Apr 15 2014

CROSSREFS