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A277914
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a(n) is the number of zeros minus the number of ones among the first n terms of A076478.
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2
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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
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OFFSET
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0,5
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COMMENTS
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A036799 gives the positions of zeros in this sequence.
Between two zeros, the graph of the sequence looks like a Takagi (or blancmange) curve.
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LINKS
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FORMULA
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a(n) = Sum_{i=0..n-1} (-1)^A076478(i) for any n>=0.
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MATHEMATICA
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Join[{0}, Flatten[Array[Accumulate[Flatten[Tuples[{1, -1}, #]]]&, 5]]] (* Paolo Xausa, Dec 08 2023 *)
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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