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A228497 Decimal expansion of the fourth root of 1/2. 5

%I

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

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

%U 4,7,5,4,9,5,3,9,0,2,2,3,9,8,1,4,3,2,4,0,0,4,1,9,9,2,9

%N Decimal expansion of the fourth root of 1/2.

%F One divided through A010767.

%F Square root of A010503.

%F Equals Product_{k>=1} (1 + (-1)^k/(4*k+1)). - _Amiram Eldar_, Aug 10 2020

%e 0.841068670567930255...

%p evalf(1/root[4](2)) ;

%t RealDigits[Surd[1/2,4],10,120][[1]] (* _Harvey P. Dale_, Oct 05 2014 *)

%o (PARI) sqrtn(2,-4) \\ _Charles R Greathouse IV_, Apr 15 2014

%Y Cf. A010503, A010767.

%K cons,nonn

%O 0,1

%A _R. J. Mathar_, Aug 23 2013

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Last modified February 26 14:18 EST 2021. Contains 341632 sequences. (Running on oeis4.)