A273598 - OEIS

A273598

Numbers n such that (11^n - 6^n)/5 is prime.

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`