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A359359
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Sum of positions of zeros in the binary expansion of n, where positions are read starting with 1 from the left (big-endian).
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24
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1, 0, 2, 0, 5, 2, 3, 0, 9, 5, 6, 2, 7, 3, 4, 0, 14, 9, 10, 5, 11, 6, 7, 2, 12, 7, 8, 3, 9, 4, 5, 0, 20, 14, 15, 9, 16, 10, 11, 5, 17, 11, 12, 6, 13, 7, 8, 2, 18, 12, 13, 7, 14, 8, 9, 3, 15, 9, 10, 4, 11, 5, 6, 0, 27, 20, 21, 14, 22, 15, 16, 9, 23, 16, 17, 10
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OFFSET
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0,3
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LINKS
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FORMULA
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EXAMPLE
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The binary expansion of 100 is (1,1,0,0,1,0,0), with zeros at positions {3,4,6,7}, so a(100) = 20.
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MATHEMATICA
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Table[Total[Join@@Position[IntegerDigits[n, 2], 0]], {n, 0, 100}]
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CROSSREFS
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A003714 lists numbers with no successive binary indices.
Cf. A000120, A048793, A065359, A069010, A070939, A073642, A083652, A328594, A328595, A359402, A359495.
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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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