A228030 Primes of the form 7^n + 6.

7, 13, 349, 33232930569607, 2651730845859653471779023381607

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..7

Mathematica

Select[Table[7^n + 6, {n, 0, 300}], PrimeQ]

Prog

(Magma) [a: n in [0..300] | IsPrime(a) where a is  7^n+6];

Crossrefs

Cf. A217130 (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), 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), this sequence (k=7, h=6), 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: A064119 A224984 A340473 * A082706 A342931 A348830

Adjacent sequences: A228027 A228028 A228029 * A228031 A228032 A228033

Keyword

nonn,easy

Author

Vincenzo Librandi, Aug 11 2013

Extensions

Corrected cross-references - Robert Price, Aug 01 2017

Status

approved