|
Search: id:A063487
|
|
| |
|
| 0, 1, 2, 3, 4, 5, 7, 9, 11, 13, 16, 20, 25
(list; graph; listen)
|
|
|
OFFSET
|
0,3
|
|
|
COMMENT
|
2^(2^n)-1 is the product of the first n Fermat numbers F(0),...,F(n-1) (A000215). Hence this sequence is just the summation of A046052, which gives the number of prime factors in each Fermat number. - T. D. Noe (noe(AT)sspectra.com), Jan 07 2003
|
|
REFERENCES
|
D. M. Burton, Elementary Number Theory, Allyn and Bacon Inc., Boston MA, 1976, p. 238.
|
|
LINKS
|
Eric Weisstein's World of Mathematics, Fermat Number
|
|
PROGRAM
|
(PARI) for(n=0, 22, print(omega(2^(2^n)-1)))
|
|
CROSSREFS
|
Cf. A051179, A000215, A046052.
Sequence in context: A158923 A008740 A089651 this_sequence A081998 A074583 A001092
Adjacent sequences: A063484 A063485 A063486 this_sequence A063488 A063489 A063490
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Jason Earls (zevi_35711(AT)yahoo.com), Jul 28 2001
|
|
EXTENSIONS
|
More terms from T. D. Noe (noe(AT)sspectra.com), Jan 07 2003
|
|
|
Search completed in 0.002 seconds
|
