|
| |
|
|
A090207
|
|
Number of factors of n-th 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
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
0,4
|
|
|
LINKS
|
Table of n, a(n) for n=0..29.
|
|
|
FORMULA
|
F(0) = 0; F(1) = 1; F(n) = F(n-1) + F(n-2); 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 A065437 A097721
Adjacent sequences: A090204 A090205 A090206 * A090208 A090209 A090210
|
|
|
KEYWORD
|
easy,nonn
|
|
|
AUTHOR
|
Felix Tubiana (fat2(AT)columbia.edu), Jan 22 2004
|
|
|
STATUS
|
approved
|
| |
|
|
