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A102906 Primes of the form 3^n+28=3^n+27+1. 2
29, 31, 37, 109, 271, 757, 59077, 4782997, 43046749, 847288609471, 717897987691852588770277, 58149737003040059690390197, 30903154382632612361920641803557, 1824800363140073127359051977856583949 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The sequence of the corresponding n starts 0, 1, 2, 4, 5, 6, 10, 14, 16, 25, 50, 54, 66, 76, 109, 124, 129, 154, 201, 210, 225, 324, 844, 1444, 2529, 3029, 3292, 3340, ... [Joerg Arndt, Jul 19 2012]

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..23

MATHEMATICA

Select[Table[3^n+28, {n, 0, 1000}], PrimeQ] (* Vincenzo Librandi, Jul 19 2012 *)

PROG

(MAGMA) [ a: n in [0..100] | IsPrime(a) where a is 3^n+28 ]; // Vincenzo Librandi, Jul 19 2012

CROSSREFS

Sequence in context: A050656 A050667 A288879 * A178456 A069453 A104071

Adjacent sequences:  A102903 A102904 A102905 * A102907 A102908 A102909

KEYWORD

nonn

AUTHOR

Roger L. Bagula, Mar 01 2005

EXTENSIONS

a(1) added by Vincenzo Librandi, Jul 19 2012

STATUS

approved

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Last modified March 20 09:48 EDT 2019. Contains 321345 sequences. (Running on oeis4.)