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 A251619 Smallest prime factor of smallest multiple of prime(n) in A098550. 3
 2, 3, 3, 2, 2, 3, 3, 2, 3, 3, 2, 2, 3, 2, 2, 2, 2, 2, 3, 2, 2, 2, 3, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(n) = A020639(A251618(n)); for n > 2: a(n) = A251715(n,1); conjecture: for n > 2: a(n) = 2 or a(n) = 3; conjecture: for n > 25: a(n) = 2. LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..1000 PROG (Haskell) a251619 = a020639 . fromIntegral . a251618 CROSSREFS Cf. A098550, A020639, A251618, A251715. Sequence in context: A269043 A309952 A059252 * A030620 A110764 A107901 Adjacent sequences:  A251616 A251617 A251618 * A251620 A251621 A251622 KEYWORD nonn AUTHOR Reinhard Zumkeller, Dec 07 2014 STATUS approved

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Last modified June 15 07:12 EDT 2021. Contains 345043 sequences. (Running on oeis4.)