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A089282 Number of distinct prime factors of floor(pi*10^n), pi=3.14... 4
1, 1, 2, 2, 3, 1, 2, 3, 5, 3, 4, 2, 3, 3, 3, 3, 5, 2, 6, 5, 4, 6, 7, 6, 3, 4, 8, 3, 4, 6, 4, 6, 7, 2, 4, 4, 6, 1, 5, 2, 4, 5, 3, 5, 4, 6, 5, 3, 7, 3, 5, 5, 3, 6, 7, 5, 4, 5, 4, 6, 5, 7, 3, 5, 4, 6, 5, 5, 3, 4, 7, 8, 6, 6, 6, 5, 5, 6, 8, 5, 5 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

a(n)=A001221(A011545(n)).

LINKS

Table of n, a(n) for n=0..80.

EXAMPLE

n=6: floor(pi*10^6)=3141592=2*2*2*392699: a(6)=2.

CROSSREFS

Cf. A089283, A000796.

Sequence in context: A055460 A067514 A115323 * A308640 A079688 A261789

Adjacent sequences:  A089279 A089280 A089281 * A089283 A089284 A089285

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Oct 30 2003

EXTENSIONS

More terms from Ray Chandler, Oct 31 2003

STATUS

approved

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Last modified October 15 23:54 EDT 2019. Contains 328038 sequences. (Running on oeis4.)