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A366955
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a(n) is the Euler totient function of the concatenation of 1,2,3,...,n.
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0
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1, 4, 80, 616, 6576, 41088, 1224720, 4027392, 82260072, 4938271560, 635485074048, 41135376570624, 12236327748685824, 411522630337040436, 65843620853926470080, 6172839452588538935840, 805372326785629836739584, 40727551345036946357114880
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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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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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