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A096504
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Euler-phi applied to A096503 results in these decimal repdigits.
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4
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1, 1, 2, 2, 4, 2, 6, 4, 6, 4, 4, 6, 8, 8, 6, 8, 22, 8, 8, 22, 66, 44, 88, 44, 88, 66, 44, 88, 88, 222, 88, 88, 222, 444, 444, 888, 888, 444, 888, 888, 888, 888, 888, 888, 444444, 666666, 444444, 888888, 888888, 666666, 888888, 888888, 888888, 888888, 888888
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OFFSET
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1,3
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LINKS
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FORMULA
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EXAMPLE
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Regular solutions: if p = repdigit + 1 is prime, then phi(p) = repdigit.
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PROG
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(PARI) lista(nn) = {for (n= 1, nn, phin = eulerphi(n); d = digits(e=eulerphi(n)); if (vecmin(d) == vecmax(d), print1(e, ", ")); ); } \\ Michel Marcus, Sep 07 2014
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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STATUS
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approved
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