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

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