A089283 Total number of prime factors of floor(Pi*10^n), Pi=3.14...

1, 1, 2, 3, 3, 1, 4, 3, 6, 3, 4, 2, 3, 3, 3, 3, 7, 2, 6, 9, 4, 6, 7, 8, 3, 5, 8, 3, 6, 6, 4, 6, 8, 2, 5, 7, 7, 1, 5, 2, 4, 6, 3, 5, 4, 6, 6, 3, 10, 3, 5, 6, 3, 6, 8, 6, 4, 5, 4, 6, 9, 7, 3, 9, 4, 6, 5, 6, 3, 6, 8, 10, 6, 7, 8, 5, 5, 7, 14, 5, 5, 4, 7, 7, 6, 8

Offset

0,3

Links

Tyler Busby, Table of n, a(n) for n = 0..200

Formula

a(n) = A001222(A011545(n)).

Example

n=6: floor(Pi*10^6) = 3141592 = 2*2*2*392699: a(6)=4.

Crossrefs

Cf. A001222, A011545, A089282, A000796.

Sequence in context: A076780 A324733 A274604 * A288531 A323942 A323944

Adjacent sequences: A089280 A089281 A089282 * A089284 A089285 A089286

Keyword

nonn

Author

Reinhard Zumkeller, Oct 30 2003

Extensions

More terms from Ray Chandler, Oct 31 2003

a(81)-a(85) from Tyler Busby, Mar 14 2025

Status

approved