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A228026 Primes of the form 4^n + 3. 4
7, 19, 67, 4099, 65539, 262147, 268435459, 1073741827, 19342813113834066795298819 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..16

MATHEMATICA

Select[Table[4^n + 3, {n, 0, 200}], PrimeQ]

PROG

(MAGMA) [a: n in [0..200] | IsPrime(a) where a is  4^n+3];

CROSSREFS

Cf. A089437 (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=3), A228027 (k=4, h=9), A182330 (k=5, h=2), 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: A305483 A046137 A193643 * A122484 A155242 A155333

Adjacent sequences:  A228023 A228024 A228025 * A228027 A228028 A228029

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 July 19 08:33 EDT 2019. Contains 325155 sequences. (Running on oeis4.)