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A010781 Decimal expansion of 19th root of 2. 1

%I

%S 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,

%T 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,

%U 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

%N Decimal expansion of 19th root of 2.

%H Vincenzo Librandi, <a href="/A010781/b010781.txt">Table of n, a(n) for n = 1..5000</a>

%F Equals Product_{k>=0} (1 + (-1)^k/(19*k + 18)). - _Amiram Eldar_, Aug 01 2020

%t RealDigits[N[2^(1/19), 100]][[1]] (* _Vincenzo Librandi_, Apr 03 2013 *)

%o (PARI) sqrtn(2,19) \\ _Charles R Greathouse IV_, Apr 15 2014

%K nonn,cons

%O 1,3

%A _N. J. A. Sloane_.

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Last modified March 8 10:14 EST 2021. Contains 341948 sequences. (Running on oeis4.)