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A023965 First digit after decimal point of 6th root of n. 1
0, 1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

When n is a sixth power, let a(n) = 0 rather than a(n) = 9. - Charles R Greathouse IV, Jan 06 2016

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

MATHEMATICA

Array[ Function[ n, RealDigits[ N[ Power[ n, 1/6 ], 10 ], 10 ]// (#[ [ 1, #[ [ 2 ] ]+1 ] ])& ], 110 ]

Table[RealDigits[Surd[n, 6], 10, 10][[1, 2]], {n, 120}] (* Harvey P. Dale, Jun 23 2016 *)

PROG

(PARI) a(n)=if(ispower(n, 6), 0, 10*frac(sqrtn(n, 6))\1) \\ Charles R Greathouse IV, Jan 06 2016

CROSSREFS

Sequence in context: A124755 A033810 A253272 * A274094 A274093 A087847

Adjacent sequences:  A023962 A023963 A023964 * A023966 A023967 A023968

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane, Olivier Gérard

STATUS

approved

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Last modified September 28 21:56 EDT 2020. Contains 337415 sequences. (Running on oeis4.)