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A058765 Primes of the form 3^n - 2^n. 9
5, 19, 211, 129009091, 68629840493971, 617671248800299, 19383245658672820642055731, 14130386091162273752461387579, 1546132562196033990574082188840405015112916155251 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..12

FORMULA

a(n) = A001047(A057468(n))

MATHEMATICA

Select[Table[3^n-2^n, {n, 0, 2200}], PrimeQ] (* Vincenzo Librandi, Dec 08 2011 *)

PROG

(MAGMA) [a: n in [0..300] | IsPrime(a) where a is  3^n - 2^n]; // Vincenzo Librandi, Dec 08 2011

CROSSREFS

Cf. A001047 (3^n-2^n) and A057468 (n such that 3^n-2^n is prime).

Sequence in context: A102262 A123281 A135171 * A067967 A092751 A122150

Adjacent sequences:  A058762 A058763 A058764 * A058766 A058767 A058768

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jan 02 2001

STATUS

approved

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Last modified July 22 03:22 EDT 2017. Contains 289648 sequences.