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A032787
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Numbers k such that k(k+1)(k+2)...(k+17) / (k+(k+1)+(k+2)+ ... +(k+17)) is an integer.
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1
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0, 2, 4, 5, 8, 9, 11, 14, 16, 17, 19, 23, 24, 29, 30, 32, 34, 37, 41, 44, 50, 51, 52, 54, 59, 63, 65, 68, 74, 76, 79, 85, 86, 89, 102, 104, 107, 113, 114, 119, 128, 129, 136, 140, 149, 154, 167, 170, 173, 179, 184, 194, 204, 206, 212, 219, 221, 239, 245, 254
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OFFSET
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1,2
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COMMENTS
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(d-17)/2 where d >= 17 divides 131939107925625. In particular, the sequence is finite. - Robert Israel, Jul 13 2018
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LINKS
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MAPLE
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sort([seq((t-17)/2, t=select(`>=`, numtheory:-divisors(131939107925625), 17))]); # Robert Israel, Jul 13 2018
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MATHEMATICA
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Select[Range[0, 300], IntegerQ[Times@@Range[#, #+17]/Total[Range[#, #+17]]]&] (* Harvey P. Dale, Sep 02 2016 *)
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CROSSREFS
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KEYWORD
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nonn,fini,full
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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