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A105080
Number of distinct prime divisors of 10000^n - 3.
1
2, 2, 2, 4, 4, 2, 3, 4, 4, 5, 4, 5, 4, 4, 4, 4, 5, 3, 5, 4, 5, 3, 4, 8, 4, 3, 6, 5, 5, 3, 7, 5, 3, 5, 1, 4, 6, 5
OFFSET
1,1
FORMULA
A105080(n) = A105068(4n) = A105069(2n). - Robert G. Wilson v, Apr 08 2005
EXAMPLE
The number of distinct prime divisors of 10000^1 - 3 is 2, so the first term is 2.
MATHEMATICA
PrimeNu[#]&/@(10000^Range[10]-3) (* The program generates the first 10 terms of the sequence. *) (* Harvey P. Dale, Feb 05 2023 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Parthasarathy Nambi, Apr 06 2005
EXTENSIONS
More terms from Robert G. Wilson v, Apr 08 2005
STATUS
approved