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A228027 Primes of the form 4^n + 9. 3
13, 73, 1033, 262153, 1073741833, 73786976294838206473, 4835703278458516698824713 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

MATHEMATICA

Select[Table[4^n + 9, {n, 0, 200}], PrimeQ]

PROG

(MAGMA) [a: n in [0..200] | IsPrime(a) where a is 4^n+9];

CROSSREFS

Cf. A217350 (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), this sequence (k=4, h=9), A182330 (k=5, h=2), 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), 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: A146618 A220414 A139157 * A159832 A139070 A094421

Adjacent sequences:  A228024 A228025 A228026 * A228028 A228029 A228030

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Aug 11 2013

EXTENSIONS

Corrected cross-references - Robert Price, Aug 01 2017

STATUS

approved

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Last modified December 11 18:34 EST 2019. Contains 329925 sequences. (Running on oeis4.)