login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A103111 Smallest natural number m such that n^n^n + m is prime. 1
1, 1, 16, 75, 2994, 96545 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

a(5)=2994 because 5^5^5 + 2994 is prime and 5^5^5 + k is composite for 0<k<2994.

PROG

(PARI) a(n)=(x->nextprime(x)-x)(n^n^n) \\ Charles R Greathouse IV, Nov 25 2014

CROSSREFS

Cf. A103112, A074966, A074967.

Sequence in context: A212690 A244835 A189949 * A118862 A118532 A253691

Adjacent sequences:  A103108 A103109 A103110 * A103112 A103113 A103114

KEYWORD

hard,more,nonn

AUTHOR

Farideh Firoozbakht, Mar 04 2005

EXTENSIONS

a(6) from Donovan Johnson, Mar 06 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 September 27 21:12 EDT 2021. Contains 347698 sequences. (Running on oeis4.)