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 A228710 Characteristic function of numbers with alternating parities of their digits in decimal representation. 11
 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0 COMMENTS a(A030141(n)) = 1; a(A228709(n)) = 0; LINKS Reinhard Zumkeller, Table of n, a(n) for n = 0..10000 FORMULA For n > 9: a(n) * a(n+1) = 0 and 0 <= a(n) + a(n+1) <= 1. PROG (Haskell) a228710 n = fromEnum \$ f (n `div` 10) (n `mod` 2) where    f x p = x == 0 || (x `mod` 2) /= p && f (x `div` 10) (1 - p) CROSSREFS Sequence in context: A014383 A014152 A014295 * A103447 A123927 A089829 Adjacent sequences:  A228707 A228708 A228709 * A228711 A228712 A228713 KEYWORD nonn,base AUTHOR Reinhard Zumkeller, Aug 31 2013 STATUS approved

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Last modified May 24 14:49 EDT 2019. Contains 323532 sequences. (Running on oeis4.)