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A273598 Numbers n such that (11^n - 6^n)/5 is prime. 3
2, 3, 11, 163, 191, 269, 1381, 1493 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

All terms are prime.

The corresponding primes: 17, 223, 56989774711, ...

LINKS

Table of n, a(n) for n=1..8.

MATHEMATICA

Select[Range[1, 10000], PrimeQ[(11^# - 6^#)/5] &]

PROG

(PARI) for(n=1, 10000, if(isprime((11^n - 6^n)/5), print1(n, ", ")))

CROSSREFS

Cf. A005808, A210506, A128027, A216181, A128347, A273599, A273600, A273601, A062577.

Sequence in context: A042337 A061482 A177854 * A135161 A066100 A029497

Adjacent sequences:  A273595 A273596 A273597 * A273599 A273600 A273601

KEYWORD

nonn,more,hard

AUTHOR

Tim Johannes Ohrtmann, May 26 2016

STATUS

approved

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Last modified May 25 22:17 EDT 2019. Contains 323576 sequences. (Running on oeis4.)