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 A072047 Number of prime factors of the squarefree numbers: omega(A005117(n)). 14
 0, 1, 1, 1, 2, 1, 2, 1, 1, 2, 2, 1, 1, 2, 2, 1, 2, 1, 3, 1, 2, 2, 2, 1, 2, 2, 1, 3, 1, 2, 1, 2, 1, 2, 2, 2, 1, 1, 2, 2, 3, 1, 2, 3, 1, 1, 2, 2, 3, 1, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 1, 1, 3, 1, 3, 2, 1, 1, 3, 2, 1, 3, 2, 2, 2, 2, 2, 1, 2, 3, 1, 2, 2, 1, 3, 1, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 COMMENTS a(n) = A001221(A005117(n)) = A001222(A005117(n)). For n > 1: length of row n in A265668. - Reinhard Zumkeller, Dec 13 2015 LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..10000 MATHEMATICA PrimeOmega[Select[Range[200], SquareFreeQ]] (* Harvey P. Dale, May 14 2011 *) PROG (Haskell) a072047 n = a072047_list !! (n-1) a072047_list = map a001221 \$ a005117_list -- Reinhard Zumkeller, Aug 08 2011 CROSSREFS Cf. A072048. Cf. A001221, A001222, A005117, A265668. Sequence in context: A192013 A329618 A026517 * A327521 A282870 A106802 Adjacent sequences:  A072044 A072045 A072046 * A072048 A072049 A072050 KEYWORD nonn,nice AUTHOR Reinhard Zumkeller, Jun 09 2002 STATUS approved

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Last modified April 13 19:42 EDT 2021. Contains 342941 sequences. (Running on oeis4.)