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 A228497 Decimal expansion of the fourth root of 1/2. 5
 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, 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, 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 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS FORMULA One divided through A010767. Square root of A010503. Equals Product_{k>=1} (1 + (-1)^k/(4*k+1)). - Amiram Eldar, Aug 10 2020 EXAMPLE 0.841068670567930255... MAPLE evalf(1/root[4](2)) ; MATHEMATICA RealDigits[Surd[1/2, 4], 10, 120][[1]] (* Harvey P. Dale, Oct 05 2014 *) PROG (PARI) sqrtn(2, -4) \\ Charles R Greathouse IV, Apr 15 2014 CROSSREFS Cf. A010503, A010767. Sequence in context: A103613 A104768 A199430 * A199285 A049255 A028577 Adjacent sequences:  A228494 A228495 A228496 * A228498 A228499 A228500 KEYWORD cons,nonn AUTHOR R. J. Mathar, Aug 23 2013 STATUS approved

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Last modified January 24 11:26 EST 2021. Contains 340399 sequences. (Running on oeis4.)