A113825 Number of distinct prime factors of A008351(n).

0, 1, 2, 2, 1, 2, 3, 5, 4, 5, 5, 7, 2

Offset: 1

Author

Parthasarathy Nambi, Jan 23 2006

Keywords

• hard
• nonn
• base

Examples

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

Links

• Dario Alejandro Alpern, Factorization using the Elliptic Curve Method.

Crossrefs

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

Cf. A008351.

Extensions

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