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A105255 Number of distinct prime divisors of 88...889 (with n 8s). +0
1
1, 2, 2, 2, 2, 2, 2, 5, 3, 2, 5, 3, 1, 6, 4 (list; graph; listen)
OFFSET

0,2

EXAMPLE

The number of distinct prime divisors of 89 is 1 (prime).

The number of distinct prime divisors of 889 is 2.

The number of distinct prime divisors of 8889 is 2.

CROSSREFS

Cf. A104543.

Sequence in context: A105069 A100825 A008767 this_sequence A140818 A139813 A129381

Adjacent sequences: A105252 A105253 A105254 this_sequence A105256 A105257 A105258

KEYWORD

nonn

AUTHOR

Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Apr 29 2005

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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