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A064085 Quotient of A000225 and A064084. 3

%I #6 Jun 09 2014 14:25:09

%S 1,1,1,1,1,3,1,1,1,11,1,39,1,43,151,1,1,171,1,2255,2359,683,1,9399,1,

%T 2731,1,140911,1,1649373,1,1,599479,43691,8727391,8965359,1,174763,

%U 9588151,139090655,1,1649061309,1,572942063,2221095391,2796203,1

%N Quotient of A000225 and A064084.

%C a(n) is equal to 1 if and only if n is a prime power; the sequence of nontrivial values of a is A064086.

%H Alois P. Heinz, <a href="/A064085/b064085.txt">Table of n, a(n) for n = 1..1000</a>

%F a(n) = A000225(n) / A064084(n).

%p a:= n-> (2^n-1)/mul(2^(i[1]^i[2])-1, i=ifactors(n)[2]):

%p seq(a(n), n=1..50); # _Alois P. Heinz_, Jun 09 2014

%Y Cf. A000225, A064084, A064086.

%K easy,nonn

%O 1,6

%A _Jens Voß_, Sep 04 2001

%E More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Mar 29 2003

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Last modified April 30 04:13 EDT 2024. Contains 372118 sequences. (Running on oeis4.)