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A061498
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Number of distinct terms in the first difference sequence of reduced residue system[=dRRS] for n.
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4
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0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 1, 2, 1, 2, 3, 1, 1, 2, 1, 2, 3, 2, 1, 2, 2, 2, 2, 2, 1, 3, 1, 1, 3, 2, 3, 2, 1, 2, 3, 2, 1, 3, 1, 2, 3, 2, 1, 2, 2, 2, 3, 2, 1, 2, 3, 2, 3, 2, 1, 3, 1, 2, 3, 1, 3, 3, 1, 2, 3, 3, 1, 2, 1, 2, 3, 2, 3, 3, 1, 2, 2, 2, 1, 3, 3, 2, 3, 2, 1, 3, 3, 2, 3, 2, 3, 2, 1, 2, 3, 2, 1, 3, 1, 2, 5
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OFFSET
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0,9
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LINKS
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Table of n, a(n) for n=0..104.
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EXAMPLE
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For n=24, RRS={1, 5, 7, 11, 13, 17, 19, 23}, dRRS={4, 2, 4, 2, 4, 2, 4}; for n=32, dRRS={2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2}; for n=31, dRRS={1, 1, 1, 1, 1, 1, 1, 1, 1, 1, ...}; for n=34, RRS={1, 3, 5, 7, 9, 11, 13, 15, 19, 21, 23, 25, 27, 29, 31, 33}, dRRS={2, 2, 2, 2, 2, 2, 2, 4, 2, 2, 2, 2, 2, 2, 2} so a(24)=2, a(32)=1, a(31)=1, a(34)=2.
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CROSSREFS
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Sequence in context: A024317 A024880 A029424 * A106029 A188431 A105153
Adjacent sequences: A061495 A061496 A061497 * A061499 A061500 A061501
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Jun 12 2001
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STATUS
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approved
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