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!)
A103859 Number of divisors of prime(n)! - prime(n)# + 1. 3

%I #10 Nov 06 2022 07:35:52

%S 1,1,4,2,4,4,4,4,16,4,8,16,16,32,32,8,32,8,16,64,32,16,32,64,512,2

%N Number of divisors of prime(n)! - prime(n)# + 1.

%H Reinhard Zumkeller, <a href="/A103855/a103855.txt">p(n)!-p(n )#+1</a>

%F a(n) = A000005(A103855(n)).

%o (PARI) a(n) = numdiv(prime(n)! - prod(k=1, n, prime(k)) + 1); \\ _Michel Marcus_, Nov 06 2022

%Y Cf. A000005, A103855, A103860, A103894.

%K nonn,more

%O 1,3

%A _Reinhard Zumkeller_, Feb 20 2005

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 April 28 14:09 EDT 2024. Contains 372087 sequences. (Running on oeis4.)