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 A228028 Primes of the form 5^n + 4. 1
 5, 29, 15629, 9765629 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..8 MATHEMATICA Select[Table[5^n + 4, {n, 0, 200}], PrimeQ] PROG (MAGMA) [a: n in [0..200] | IsPrime(a) where a is  5^n+4]; CROSSREFS Cf. A124621 (associated n). Cf. Primes of the form k^n + h: A092506 (k=2, h=1), A057733 (k=2, h=3), A123250 (k=2, h=5), A104066 (k=2, h=7), A104070 (k=2, h=9), A057735 (k=3, h=2), A102903 (k=3, h=4), A102870 (k=3, h=8), A102907 (k=3, h=10), A290200 (k=4, h=1), A228027 (k=4, h=9), A182330 (k=5, h=2), this sequence (k=5, h=4), A228029 (k=5, h=6), A102910 (k=5, h=8), A182331 (k=6, h=1), A104118 (k=6, h=5), A104115 (k=6, h=7), A104065 (k=7, h=4), A228030 (k=7, h=6), A228031 (k=7, h=10), A228032 (k=8, h=3), A228033 (k=8, h=5), A144360 (k=8, h=7), A145440 (k=8, h=9), A228034 (k=9, h=2), A159352 (k=10, h=3), A159031 (k=10, h=7). Sequence in context: A237188 A086720 A056869 * A237256 A172041 A187605 Adjacent sequences:  A228025 A228026 A228027 * A228029 A228030 A228031 KEYWORD nonn AUTHOR Vincenzo Librandi, Aug 11 2013 EXTENSIONS Corrected cross-references - Robert Price, Aug 01 2017 STATUS approved

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Last modified July 15 14:33 EDT 2019. Contains 325031 sequences. (Running on oeis4.)