login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A318474 Multiplicative with a(p^e) = 2^A000045(e+1). 5

%I #13 Sep 23 2018 21:30:27

%S 1,2,2,4,2,4,2,8,4,4,2,8,2,4,4,32,2,8,2,8,4,4,2,16,4,4,8,8,2,8,2,256,

%T 4,4,4,16,2,4,4,16,2,8,2,8,8,4,2,64,4,8,4,8,2,16,4,16,4,4,2,16,2,4,8,

%U 8192,4,8,2,8,4,8,2,32,2,4,8,8,4,8,2,64,32,4,2,16,4,4,4,16,2,16,4,8,4,4,4,512,2,8,8,16,2,8,2,16,8

%N Multiplicative with a(p^e) = 2^A000045(e+1).

%H Antti Karttunen, <a href="/A318474/b318474.txt">Table of n, a(n) for n = 1..16384</a>

%H <a href="/index/Eu#epf">Index entries for sequences computed from exponents in factorization of n</a>

%F a(n) = 2^A318473(n).

%F a(n) = A318472(A064549(n)).

%F a(A064549(n)) = a(n)*A318472(n).

%t Array[Apply[Times, 2^Fibonacci[# + 1] & /@ FactorInteger[#][[All, -1]]] - Boole[# == 1] &, 105] (* _Michael De Vlieger_, Sep 02 2018 *)

%o (PARI) A318474(n) = factorback(apply(e -> 2^fibonacci(1+e),factor(n)[,2]));

%Y Cf. A000045, A318465, A318472, A318473.

%K nonn,mult

%O 1,2

%A _Antti Karttunen_, Aug 29 2018

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 14 05:06 EDT 2024. Contains 374291 sequences. (Running on oeis4.)