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A113825 Number of distinct prime factors of A008351(n). 0
0, 1, 2, 2, 1, 2, 3, 5, 4, 5, 5, 7, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..13.

Dario Alejandro Alpern, Factorization using the Elliptic Curve Method.

EXAMPLE

The number of distinct prime factors of 212 is 2 which is the third term in the sequence.

CROSSREFS

A008351: Concatenate a(n-1) and a(n-2) with a(1)=1 & a(2)=2.

Cf. A008351.

Sequence in context: A239481 A200114 A120652 * A011138 A022479 A021456

Adjacent sequences:  A113822 A113823 A113824 * A113826 A113827 A113828

KEYWORD

hard,nonn,base

AUTHOR

Parthasarathy Nambi, Jan 23 2006

EXTENSIONS

a(11)-a(13) from Robert G. Wilson v, Jan 27 2006

STATUS

approved

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Last modified August 24 22:39 EDT 2019. Contains 326314 sequences. (Running on oeis4.)