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 A276794 Indicator function for A003145. 7
 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0 COMMENTS a(n) = 1 iff n is a member of A003145. a(n+1) = 1 iff n is a member of A278040, for n >= 0. - Wolfdieter Lang, Dec 06 2018 LINKS N. J. A. Sloane, Table of n, a(n) for n = 0..10000 Wolfdieter Lang, The Tribonacci and ABC Representations of Numbers are Equivalent, arXiv preprint arXiv:1810.09787 [math.NT], 2018. FORMULA a(n+1) = t(n)*(2 - t(n)), where  t(n) = A080843(n), for n >= 0; and a(0) = 0. - Wolfdieter Lang, Dec 06 2018 CROSSREFS Cf. A003145, A080843, A276797, A278040. A276793(n)+A276794(n)+A276791(n)=1; A276796(n)+A276797(n)+A276798(n)=n+1. Sequence in context: A288173 A221150 A288997 * A289025 A289112 A289165 Adjacent sequences:  A276791 A276792 A276793 * A276795 A276796 A276797 KEYWORD nonn,easy AUTHOR N. J. A. Sloane, Oct 28 2016 STATUS approved

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Last modified August 18 04:50 EDT 2019. Contains 326072 sequences. (Running on oeis4.)