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A128451 Numbers n such that absolute value of 11^n - n^11 is prime. 8
8, 14, 80, 212, 230, 1352, 13674, 16094, 44772 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Two larger terms 13674 and 16094 found by Donovan Johnson, Jul 2005.

LINKS

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

MATHEMATICA

lst={}; k=11; Do[If[PrimeQ[Abs[k^n-n^k]], AppendTo[lst, n]], {n, 0, 10^4}]; lst (* Vladimir Joseph Stephan Orlovsky, Sep 10 2008 *)

PROG

(PARI) is(n)=ispseudoprime(abs(11^n-n^11)) \\ Charles R Greathouse IV, Feb 17 2017

CROSSREFS

Cf. A072180, A109387, A117705, A117706, A128447, A128448, A128449, A128450, A122003, A128453.

Sequence in context: A268160 A236553 A050582 * A177170 A275006 A219778

Adjacent sequences:  A128448 A128449 A128450 * A128452 A128453 A128454

KEYWORD

hard,more,nonn,less

AUTHOR

Alexander Adamchuk, Mar 03 2007

EXTENSIONS

a(6)-a(8) from Donovan Johnson, Feb 26 2008

a(9) discovered by Serge Batalov, entered by Robert Price, Apr 11 2019

STATUS

approved

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Last modified September 20 20:02 EDT 2020. Contains 337265 sequences. (Running on oeis4.)