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!)
A062701 Index of factorial primes of the form k! + 1. 3
1, 2, 4, 2428957 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
FORMULA
a(n) = PrimePi(A002981(n)!+1).
EXAMPLE
The exact subscript of the 5th prime [1 + 27! = 10888869450418352160768000001] is not yet available.
CROSSREFS
Sequence in context: A274990 A079236 A138852 * A341805 A252783 A192225
KEYWORD
hard,nonn,more
AUTHOR
Labos Elemer, Jul 11 2001
EXTENSIONS
Offset 1 from Michel Marcus, Aug 29 2019
STATUS
approved

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 February 22 06:21 EST 2024. Contains 370240 sequences. (Running on oeis4.)