login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A151894 Numbers n such that n! + second prime after n! is prime. 3
2, 3, 5, 6, 7, 8, 11, 17, 42, 66, 76, 93, 139, 157 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Because numbers of the form: (n! + prime) are divisible by all primes <= n that mean that first prime number can have form n! + next prime after n! and no primes of the form n! + k for k > 1 and k < next prime after n!

LINKS

Table of n, a(n) for n=1..14.

MATHEMATICA

a = {}; Do[If[PrimeQ[n! + NextPrime[n!, 2]], AppendTo[a, n]], {n, 1, 200]; a (*Artur Jasinski*)

CROSSREFS

Cf. A002981, A151892, A151893, A151903.

Sequence in context: A191167 A006431 A285528 * A028229 A104452 A062877

Adjacent sequences:  A151891 A151892 A151893 * A151895 A151896 A151897

KEYWORD

nonn

AUTHOR

Artur Jasinski, Apr 12 2008

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 22 13:47 EST 2019. Contains 329393 sequences. (Running on oeis4.)