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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.

Index entries for characteristic functions

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.)