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A133304 Number of distinct prime factors of A101291. 1
2, 3, 5, 5, 5, 6, 5, 5, 5, 4, 5, 4, 5, 7, 7, 6, 5, 4, 5, 9, 7, 5, 4, 5, 6, 6, 8, 5, 6, 4, 7, 5, 7, 5, 5, 7, 4, 4, 6, 7 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
The number of distinct prime factors of 45 is 2.
The number of distinct prime factors of 4905 is 3.
The number of distinct prime factors of 494550 is 5.
MAPLE
A101291 := proc(n) 99*100^n/200-9*10^n/20 ; end: A133304 := proc(n) nops(numtheory[factorset](A101291(n))) ; end: for n from 1 do printf("%d, \n", A133304(n)) ; od: # R. J. Mathar, Jul 08 2009
CROSSREFS
Cf. A101291.
Sequence in context: A131295 A102642 A183228 * A246401 A003660 A065688
KEYWORD
nonn,base
AUTHOR
Parthasarathy Nambi, Oct 18 2007
EXTENSIONS
28 more terms from R. J. Mathar, Jul 08 2009
STATUS
approved

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Last modified March 19 02:58 EDT 2024. Contains 370952 sequences. (Running on oeis4.)