A062654 - OEIS

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

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 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A062654

Numbers k such that 88^k - 87^k is prime or a strong pseudoprime.

5, 7, 19, 241, 607, 74047

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

All terms must be prime. - M. F. Hasler, Sep 21 2013

a(7) > 10^5. - Robert Price, May 28 2015

LINKS

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

MATHEMATICA

Select[Range[0, 1000], PrimeQ[88^# - 87^#] &] (* Robert Price, May 28 2015 *)

PROG

(PARI) is(n)=ispseudoprime(88^n-87^n) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Cf. A000043, A057468, A059801, A059802, A059803, A062572-A062652, A215536, A062655-A062666.

Sequence in context: A101588 A288405 A280150 * A231865 A130729 A222411

Adjacent sequences: A062651 A062652 A062653 * A062655 A062656 A062657

KEYWORD

nonn,hard

AUTHOR

Mike Oakes, May 18 2001, May 19 2001

EXTENSIONS

Edited by M. F. Hasler, Sep 21 2013

a(6) from Robert Price, May 28 2015 (computer run by Adam Marciniec)

STATUS

approved