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 A247872 Least prime factor of A247681(n). 1
 5, 7, 5, 7, 5, 11, 17, 5, 7, 19, 5, 11, 7, 5, 13, 5, 11, 23, 5, 19, 7, 5, 13, 7, 5, 17, 5, 7, 13, 5, 23, 7, 5, 29, 17, 5, 11, 13, 5, 31, 7, 37, 19, 5, 11, 7, 5, 17, 5, 7, 11, 5, 29, 7, 5, 17, 11, 5, 31, 23, 41, 5, 13, 7, 5, 19, 7, 5, 13, 5, 7, 5, 23, 7, 5, 19, 11, 31, 5, 5, 7, 11, 5, 37, 7, 5, 47, 53, 11, 5, 7, 43, 13, 5, 7 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,1 LINKS Odimar Fabeny, Table of n, a(n) for n = 2..10000 MAPLE count:= 0: for n from 1 while count < 100 do    m:= 1+18*n;    if not isprime(m) then       count:= count+1;       A[count]:= min(numtheory:-factorset(m))    fi od: seq(A[i], i=1..count); # Robert Israel, Sep 30 2014 CROSSREFS Cf. A056608, A247681. Sequence in context: A144567 A215732 A010718 * A306400 A090987 A278813 Adjacent sequences:  A247869 A247870 A247871 * A247873 A247874 A247875 KEYWORD nonn,easy AUTHOR Odimar Fabeny, Sep 25 2014 STATUS approved

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Last modified September 29 09:40 EDT 2020. Contains 337428 sequences. (Running on oeis4.)