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A277914 a(n) = number of zeros minus the number of ones among the n first terms of A076478. 1
0, 1, 0, 1, 2, 3, 2, 1, 2, 1, 0, 1, 2, 3, 4, 5, 4, 5, 4, 5, 6, 5, 4, 3, 4, 5, 4, 5, 4, 3, 2, 3, 2, 1, 0, 1, 2, 3, 4, 5, 6, 7, 6, 7, 8, 7, 8, 9, 10, 9, 8, 9, 8, 9, 10, 11, 10, 11, 10, 11, 10, 9, 10, 11, 10, 9, 8, 7, 8, 9, 10, 9, 10, 11, 10, 9, 10, 9, 10, 9, 10 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

COMMENTS

A036799 gives the positions of zeros in this sequence.

Between two zeros, the graph of the sequence looks like a Takagi (or blancmange) curve.

LINKS

Rémy Sigrist, Table of n, a(n) for n = 0..10000

Wikipedia, Blancmange curve

FORMULA

a(n) = Sum_{i=0..n-1} (-1)^A076478(i) for any n>=0.

CROSSREFS

Cf. A076478, A036799.

Sequence in context: A154556 A260228 A316657 * A126626 A137927 A321864

Adjacent sequences:  A277911 A277912 A277913 * A277915 A277916 A277917

KEYWORD

nonn,base

AUTHOR

Rémy Sigrist, Nov 03 2016

STATUS

approved

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Last modified March 23 05:36 EDT 2019. Contains 321422 sequences. (Running on oeis4.)