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 A102903 Primes of the form 3^k + 4. 14
 5, 7, 13, 31, 733, 19687, 59053, 31381059613, 205891132094653, 109418989131512359213, 1570042899082081611640534567, 323257909929174534292273980721360271853391 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..17 FORMULA a(n) = 3^A058958(n) + 4. - Elmo R. Oliveira, Nov 09 2023 MATHEMATICA Select[Table[3^n+4, {n, 0, 200}], PrimeQ] (* Vincenzo Librandi, Jul 19 2012 *) PROG (Magma) [a: n in [0..100] | IsPrime(a) where a is 3^n+4]; // Vincenzo Librandi, Jul 19 2012 CROSSREFS Cf. A000040, A058958 (associated k). Cf. Primes of the form 3^k + d: A057735 (d=2), this sequence (d=4), A102870 (d=8), A102907 (d=10), A102874 (d=14), A243437 (d=16), A102904 (d=20), A243438 (d=22), A243439 (d=26), A102906 (d=28). Sequence in context: A288889 A168609 A266951 * A294064 A018464 A063446 Adjacent sequences: A102900 A102901 A102902 * A102904 A102905 A102906 KEYWORD nonn AUTHOR Roger L. Bagula, Mar 01 2005 EXTENSIONS Edited by Zak Seidov, Aug 29 2014 STATUS approved

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Last modified February 28 12:52 EST 2024. Contains 370394 sequences. (Running on oeis4.)