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 A168184 Characteristic function of numbers that are not multiples of 10. 17
 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Reinhard Zumkeller, Table of n, a(n) for n = 0..1000 Index entries for linear recurrences with constant coefficients, signature (0,0,0,0,0,0,0,0,0,1). FORMULA a(n+10) = a(n); a(n) = A000007(A010879(n)); a(A067251(n)) = 1; a(A008592(n)) = 0; not the same as A168046: a(n)=A168046 for n<=100; A033442(n) = Sum_{k=0..n} a(k)*(n-k). Dirichlet g.f.: (1-1/10^s)*zeta(s). - R. J. Mathar, Feb 19 2011 For the general case: the characteristic function of numbers that are not multiples of m is a(n)=floor((n-1)/m)-floor(n/m)+1, m,n > 0. - Boris Putievskiy, May 08 2013 PROG (Haskell) a168184 = (1 -) . (0 ^) . (`mod` 10) a168184_list = cycle [0, 1, 1, 1, 1, 1, 1, 1, 1, 1] -- Reinhard Zumkeller, Oct 10 2012 (PARI) a(n)=n%10>0 \\ Charles R Greathouse IV, Sep 24 2015 CROSSREFS Cf. A168185, A145568, A168182, A168181, A109720, A097325, A011558, A166486, A011655, A000035, A010690, A033442. Sequence in context: A204447 A188642 A168046 * A013595 A339145 A011582 Adjacent sequences: A168181 A168182 A168183 * A168185 A168186 A168187 KEYWORD nonn,easy AUTHOR Reinhard Zumkeller, Nov 30 2009 STATUS approved

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Last modified December 7 14:20 EST 2022. Contains 358656 sequences. (Running on oeis4.)