

A090207


Number of factors of nth nonprime Fibonacci number.


0



1, 1, 1, 3, 2, 2, 2, 6, 2, 3, 3, 5, 2, 4, 3, 2, 9, 3, 2, 4, 4, 7, 2, 4, 3, 2, 3, 10, 3, 3
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OFFSET

0,4


LINKS

Table of n, a(n) for n=0..29.


FORMULA

F(0) = 0; F(1) = 1; F(n) = F(n1) + F(n2); F(0:9) = 0, 1, 1, 2, 3, 5, 8, 13, 21, 34 The nonprime numbers are: 0, 1, 1, 8, 21, 34 which have number of factors: 1, 1, 1, 3, 2, 2


CROSSREFS

Cf. A090206, A000045.
Sequence in context: A175333 A130845 A134653 * A202538 A239736 A065437
Adjacent sequences: A090204 A090205 A090206 * A090208 A090209 A090210


KEYWORD

easy,nonn


AUTHOR

Felix Tubiana (fat2(AT)columbia.edu), Jan 22 2004


STATUS

approved



