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A023966 First digit after decimal point of 7th root of n. 1

%I #15 Jun 21 2016 20:11:04

%S 0,1,1,2,2,2,3,3,3,3,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,6,6,6,6,6,6,6,6,

%T 6,6,6,6,6,6,6,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,

%U 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,9,9,9,9,9,9,9,9,9,9,9,9,9

%N First digit after decimal point of 7th root of n.

%H Vincenzo Librandi, <a href="/A023966/b023966.txt">Table of n, a(n) for n = 1..1000</a>

%t Array[ Function[ n, RealDigits[ N[ Power[ n, 1/7 ], 10 ], 10 ]// (#[ [ 1, #[ [ 2 ] ]+1 ] ])& ], 110 ]

%t fd7[n_]:=Module[{rd=RealDigits[Surd[n,7],10,20],a,b},a=rd[[1]];b=rd[[2]];a[[b+1]]]; Array[fd7,110] (* _Harvey P. Dale_, Jun 21 2016 *)

%K nonn,base

%O 1,4

%A _N. J. A. Sloane_, _Olivier GĂ©rard_

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Last modified March 29 10:59 EDT 2024. Contains 371277 sequences. (Running on oeis4.)