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A224420 Primes of the form 3^n - n. 5
2, 7, 6553, 3486784381, 12157665459056928761, 41745579179292917813953351511015323088870709281977, 30432527221704537086371993251530170531786747066636939 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The next term is too big to display. Corresponding n are given in A058037.

LINKS

Table of n, a(n) for n=1..7.

MAPLE

A224420:=proc(q) local n;

for n from 1 to q do if isprime(3^n-n) then print(3^n-n); fi; od; end:

A224420(100); # Paolo P. Lava, Apr 19 2013

MATHEMATICA

Select[Table[3^k - k, {k, 2, 200, 2}], PrimeQ] (* Bruno Berselli, Apr 07 2013 *)

CROSSREFS

Cf. A081296, A024024, A224451, A058037.

Sequence in context: A174308 A088549 A226704 * A106023 A309411 A215438

Adjacent sequences:  A224417 A224418 A224419 * A224421 A224422 A224423

KEYWORD

nonn

AUTHOR

Alex Ratushnyak, Apr 06 2013

STATUS

approved

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Last modified October 20 08:05 EDT 2019. Contains 328252 sequences. (Running on oeis4.)