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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 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 December 4 18:08 EST 2021. Contains 349526 sequences. (Running on oeis4.)