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A062607 Numbers n such that 41^n - 40^n is prime. 0
7, 11, 13, 67, 1051, 9257, 9521, 15077, 21851, 53323, 69427 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Terms greater than 1000 are often only strong pseudoprimes.

a(12) > 10^5. - Robert Price, Jul 31 2012

LINKS

Table of n, a(n) for n=1..11.

PROG

(PARI) is(n)=ispseudoprime(41^n-40^n) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

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

Sequence in context: A116442 A191083 A288610 * A018768 A045970 A004235

Adjacent sequences:  A062604 A062605 A062606 * A062608 A062609 A062610

KEYWORD

nonn,hard

AUTHOR

Mike Oakes, May 18 2001, May 19 2001

EXTENSIONS

a(8)-a(11) (Computed by Adam Marciniec) from Robert Price, Jul 31 2012

STATUS

approved

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Last modified September 20 14:35 EDT 2020. Contains 337265 sequences. (Running on oeis4.)