A074699 a(n) = tau(Fibonacci(24*2^n))/(24*2^n) where tau(x) is the number of divisors of x (A000005(x)).

3, 7, 32, 144, 5120, 180224, 3145728, 3489660928

Offset

0,1

Comments

Are terms always integers?

Links

Table of n, a(n) for n=0..7.

Maple

with(numtheory): with(combinat): a:=n->tau(fibonacci(24*2^n))/(24*2^n): seq(a(n), n=0..4); # Emeric Deutsch, Jan 30 2006

Mathematica

Table[DivisorSigma[0, Fibonacci[24 2^n]] / (24 2^n), {n, 0, 5}] (* Vincenzo Librandi, Sep 11 2017 *)

Prog

(PARI) a(n) = numdiv(fibonacci(24*2^n))/(24*2^n); \\ Michel Marcus, Sep 10 2017
(Magma) [NumberOfDivisors(Fibonacci(24*2^n))/(24*2^n): n in [0..5]]; // Vincenzo Librandi, Sep 11 2017

Crossrefs

Cf. A063375, A074698.

Sequence in context: A163081 A332386 A096239 * A115088 A089622 A241147

Adjacent sequences: A074696 A074697 A074698 * A074700 A074701 A074702

Keyword

more,nonn

Author

Benoit Cloitre, Sep 03 2002

Extensions

a(5) from Eric Rowland, Jun 18 2017

a(6)-a(7) from Amiram Eldar, Sep 03 2019 (using FactorDB)

Status

approved