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!)
A057916 Numbers k such that 3*5^k + 2 is prime. 1
0, 1, 4, 5, 6, 10, 18, 30, 34, 53, 256, 304, 309, 400, 468, 766, 1470, 2125, 2238, 2404, 4708, 5884, 6264, 8676 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

a(25) > 21230. - Jinyuan Wang, Dec 08 2019

LINKS

Table of n, a(n) for n=1..24.

MATHEMATICA

Do[ If[ PrimeQ[ 3*5^n + 2 ], Print[ n ] ], {n, 0, 2000} ]

PROG

(PARI) is(n)=ispseudoprime(3*5^n+2) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Sequence in context: A079257 A001609 A101590 * A249853 A162415 A007606

Adjacent sequences:  A057913 A057914 A057915 * A057917 A057918 A057919

KEYWORD

nonn,more

AUTHOR

Robert G. Wilson v, Nov 16 2000

EXTENSIONS

First term 0 inserted by Georg Fischer, Aug 01 2019

a(22)-a(24) from Jinyuan Wang, Dec 08 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 12 16:05 EDT 2021. Contains 344959 sequences. (Running on oeis4.)