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A085030 Number of prime factors of cyclotomic(n,5), which is A019323(n), the value of the n-th cyclotomic polynomial evaluated at x=5. 1

%I

%S 2,2,1,2,2,2,1,2,2,1,1,1,1,2,2,3,2,2,3,2,2,3,2,1,4,2,4,1,3,2,2,3,2,2,

%T 4,2,3,3,2,2,2,4,2,2,3,2,1,1,1,2,3,3,3,4,5,1,1,2,2,2,3,3,3,4,3,2,5,4,

%U 4,2,2,3,3,3,5,2,3,2,3,2,2,4,3,2,3,4,3,1,6,1,2,1,4,3,4,2,3,3,4,3

%N Number of prime factors of cyclotomic(n,5), which is A019323(n), the value of the n-th cyclotomic polynomial evaluated at x=5.

%C The Mobius transform of this sequence yields A057956, number of prime factors of 5^n-1.

%D See references at A085021

%t Table[Plus@@Transpose[FactorInteger[Cyclotomic[n, 5]]][[2]], {n, 1, 100}]

%Y Cf. A019323, A057956, A085021.

%K nonn

%O 1,1

%A _T. D. Noe_, Jun 19 2003

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Last modified September 27 13:13 EDT 2020. Contains 337380 sequences. (Running on oeis4.)