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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A227171 Numbers n such that (18^n + 17^n)/35 is prime. 2
3, 47, 53, 2411, 4057, 7963, 10273, 15737, 53299 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

All terms are prime.

LINKS

Table of n, a(n) for n=1..9.

PROG

(PARI) is(n)=ispseudoprime((18^n+17^n)/35) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Cf. A000978, A057469, A128066, A128335, A128336, A187805, A181141, A187819, A217095.

Sequence in context: A128109 A159246 A178466 * A055058 A139845 A084295

Adjacent sequences:  A227168 A227169 A227170 * A227172 A227173 A227174

KEYWORD

hard,nonn,more

AUTHOR

Jean-Louis Charton, Jul 03 2013

EXTENSIONS

a(7), a(8) from Richard Fischer, Aug 18 2013

a(9) from Robert Price, Aug 25 2013

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 17 22:53 EDT 2019. Contains 327147 sequences. (Running on oeis4.)