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A375851
Decimal expansion of the 7th root of 306.
0
2, 2, 6, 5, 1, 8, 1, 7, 8, 6, 2, 9, 5, 6, 9, 7, 7, 4, 7, 7, 4, 5, 6, 7, 2, 1, 3, 2, 6, 3, 2, 7, 2, 4, 1, 1, 8, 9, 2, 1, 3, 1, 4, 4, 8, 4, 8, 6, 9, 6, 9, 9, 9, 4, 6, 5, 3, 1, 6, 7, 0, 9, 0, 4, 8, 4, 1, 4, 2, 2, 7, 4, 2, 0, 5, 4, 9, 3, 4, 7, 5, 1, 5, 4, 9, 1, 2, 2, 2, 1, 6, 2, 1, 4, 8, 5, 4, 1, 8, 9
OFFSET
1,1
COMMENTS
Calculated to 2800 digits by R. William Gosper in a 1976 contest where this task was the problem number 9.
REFERENCES
David Wells, The Penguin Dictionary of Curious and Interesting Numbers. Penguin Books, NY, 1986, Revised edition 1987. See pp. 151-152.
LINKS
Fred Gruenberger, Contest 12: Countdown, Popular Computing, Vol. 4, No. 10 (1976), p. 10.
Fred Gruenberger, Contest 12 results, Popular Computing, Vol. 5, No. 3 (1977), p. 6.
Fred Gruenberger, Gosper, Popular Computing, Vol. 5, No. 5 (1977), p. 18.
Fred Gruenberger, Computer Recreations, Scientific American, Vol. 250, No. 4 (1984), pp. 19-27.
FORMULA
Equals A010769*A011261*A011381. - R. J. Mathar, Sep 23 2024
EXAMPLE
2.26518178629569774774567213263272411892131...
MATHEMATICA
RealDigits[306^(1/7), 10, 100][[1]]
PROG
(PARI) sqrtn(306, 7) \\ Amiram Eldar, Sep 18 2024
KEYWORD
nonn,cons,easy
AUTHOR
Stefano Spezia, Sep 15 2024
STATUS
approved