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A010680 Decimal expansion of 1/11. 3
0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0, 9, 0 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..80.

Index entries for linear recurrences with constant coefficients, signature (0,1).

FORMULA

Period 2.

a(n) = 9/2*[1 - (-1)^n], a(n) = 9*(n mod 2) - Paolo P. Lava, Oct 31 2006

EXAMPLE

1/11 = 0.0909090909090909090909090909090909090909090909090909090909...

MATHEMATICA

RealDigits[1/11, 10, 100][[1]] (* Alonso del Arte, Mar 11 2018 *)

PROG

(PARI) a(n) = 9*(n%2); \\ Altug Alkan, Mar 25 2018

CROSSREFS

Sequence in context: A272965 A059058 A021015 * A248724 A278144 A198220

Adjacent sequences:  A010677 A010678 A010679 * A010681 A010682 A010683

KEYWORD

nonn,easy,cons

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified January 21 19:08 EST 2019. Contains 319350 sequences. (Running on oeis4.)