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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A151892 Numbers n such that n! + next prime after n! is prime. 3
1, 2, 3, 4, 6, 7, 14, 15, 20, 25, 32, 34, 35, 67, 89, 191, 316, 411 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

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!

Next term exceeds 600. [From Robert G. Wilson v, Jun 11 2010]

LINKS

Table of n, a(n) for n=1..18.

MATHEMATICA

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

CROSSREFS

Cf. A002981, A151894, A151893, A151903.

Sequence in context: A039947 A096477 A039059 * A162570 A073639 A130776

Adjacent sequences:  A151889 A151890 A151891 * A151893 A151894 A151895

KEYWORD

nonn

AUTHOR

Artur Jasinski, Apr 12 2008

EXTENSIONS

a(17) & a(18) from Robert G. Wilson v, Jun 11 2010

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 March 26 10:18 EDT 2019. Contains 321491 sequences. (Running on oeis4.)