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 A010680 Decimal expansion of 1/11. 4
 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 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 STATUS approved

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Last modified April 19 04:49 EDT 2021. Contains 343105 sequences. (Running on oeis4.)