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A109228
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Numbers k such that k divides A109227(k); or k such that A109227(k) is a Niven number.
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1
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1, 3, 9, 17, 159, 5607, 15219, 54651, 56403, 100147, 120957
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OFFSET
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1,2
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COMMENTS
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a(12) > 2*10^5, if it exists.
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LINKS
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EXAMPLE
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a(2) = 3 because A109227(3) = 1101 and 1101/3 = 367.
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MATHEMATICA
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Select[Range[160], Divisible[FromDigits[Boole @ PrimeQ[Range[Prime[#]]]], #] &] (* Amiram Eldar, Aug 18 2020 *)
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CROSSREFS
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KEYWORD
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nonn,base,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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