login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A062644 Numbers k such that 78^k - 77^k is prime. 0
7, 5749 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Terms > 1000 are often only strong pseudoprimes.

a(3) > 10^5. - Robert Price, Oct 04 2014

LINKS

Table of n, a(n) for n=1..2.

PROG

(PARI) is(n)=ispseudoprime(78^n-77^n) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Cf. A000043, A057468, A059801, A059802, A062572-A062666.

Sequence in context: A219893 A243780 A246519 * A103174 A203693 A125036

Adjacent sequences: A062641 A062642 A062643 * A062645 A062646 A062647

KEYWORD

nonn,hard,bref,more

AUTHOR

Mike Oakes, May 18 2001, May 19 2001

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 4 19:07 EST 2022. Contains 358563 sequences. (Running on oeis4.)