A060283 - OEIS

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A060283

Periodic part of decimal expansion of reciprocal of n-th prime (leading 0's moved to end).

0, 3, 0, 142857, 90, 769230, 5882352941176470, 526315789473684210, 4347826086956521739130, 3448275862068965517241379310, 322580645161290, 270, 24390, 232558139534883720930, 2127659574468085106382978723404255319148936170

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

T. D. Noe, Table of n, a(n) for n=1..100

FORMULA

A060283 = A036275 o A000040, i.e., a(n) = A036275(A000040(n)). - M. F. Hasler, Dec 28 2015

EXAMPLE

1/11 = .09090909..., so a(5) = 90.

MATHEMATICA

Table[FromDigits[FindTransientRepeat[RealDigits[1/p, 10, 100][[1]], 2][[2]]], {p, Prime[Range[20]]}] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jul 10 2021 *)

PROG

(PARI) a(n)=t=iferr(znorder(Mod(10, n)), E, 0); d=(10^t-1)/n; s=t-#Str(d); if(s, d*10^s, d)

forprime(i=1, 1e2, print1(a(i)", ")) \\ Lear Young, Mar 01 2014

CROSSREFS

Cf. A036275, A060251.

Sequence in context: A076951 A359561 A060282 * A255851 A334743 A078529

Adjacent sequences: A060280 A060281 A060282 * A060284 A060285 A060286

KEYWORD

nonn,easy,base

AUTHOR

N. J. A. Sloane, Mar 30 2001

EXTENSIONS

More terms from Klaus Brockhaus, Mar 30 2001

STATUS

approved