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A281365
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Number of distinct multiplicative groups mod n, allowing any choice of identity element.
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2
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1, 2, 3, 3, 4, 6, 5, 6, 5, 8, 5, 10, 7, 10, 14, 9, 6, 10, 7, 14, 17, 10, 5, 24, 7, 14, 7, 17, 7, 28, 9, 12, 17, 12, 24, 17, 10, 14, 25, 36, 9, 34, 9, 17, 24, 10, 5, 38, 9, 14, 22, 25, 7, 14, 24, 42, 24, 14, 5, 56, 13, 18, 39, 15, 40, 34, 9, 22, 17, 48, 9, 42
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OFFSET
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1,2
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LINKS
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FORMULA
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EXAMPLE
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For instance a(10) = 8 because the following are multiplicative groups mod 10: {0*} {1*} {5*} {6*} {4,6*} {2,4,6*,8} {1*,9} {1*,3,7,9}, with identity elements marked with asterisks.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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