A251139 - OEIS

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A251139

Number of distinct prime factors of A098548(n).

4

0, 1, 1, 1, 1, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 3, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 3, 2, 3, 1, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 3, 2, 3

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OFFSET

1,6

COMMENTS

a(n) = A001221(A098548(n)).

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

PROG

(Haskell)

a251139 = a001221 . fromIntegral . a098548

CROSSREFS

Cf. A001221, A098548, A251138, A251141.

Sequence in context: A026498 A140685 A055666 * A195061 A064130 A129139

Adjacent sequences: A251136 A251137 A251138 * A251140 A251141 A251142

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Nov 30 2014

STATUS

approved