cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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

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%I A074699 #27 Sep 08 2022 08:45:07
%S A074699 3,7,32,144,5120,180224,3145728,3489660928
%N A074699 a(n) = tau(Fibonacci(24*2^n))/(24*2^n) where tau(x) is the number of divisors of x (A000005(x)).
%C A074699 Are terms always integers?
%p A074699 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
%t A074699 Table[DivisorSigma[0, Fibonacci[24 2^n]] / (24 2^n), {n, 0, 5}] (* _Vincenzo Librandi_, Sep 11 2017 *)
%o A074699 (PARI) a(n) = numdiv(fibonacci(24*2^n))/(24*2^n); \\ _Michel Marcus_, Sep 10 2017
%o A074699 (Magma) [NumberOfDivisors(Fibonacci(24*2^n))/(24*2^n): n in [0..5]]; // _Vincenzo Librandi_, Sep 11 2017
%Y A074699 Cf. A063375, A074698.
%K A074699 more,nonn
%O A074699 0,1
%A A074699 _Benoit Cloitre_, Sep 03 2002
%E A074699 a(5) from _Eric Rowland_, Jun 18 2017
%E A074699 a(6)-a(7) from _Amiram Eldar_, Sep 03 2019 (using FactorDB)