A174271 Primes p such that 19^p-18 is also prime.

3, 5, 7, 197

Offset

1,1

Links

Table of n, a(n) for n=1..4.

Example

For p=3, 19^3-18=6841; p=5, 19^5-18=2476081; p=7, 19^7-18=893871721

Prog

(Magma) [ p: p in PrimesUpTo(2000)| IsPrime(19^p-18)]

Crossrefs

Sequence in context: A259385 A114366 A088092 * A211678 A082756 A268693

Adjacent sequences: A174268 A174269 A174270 * A174272 A174273 A174274

Keyword

nonn

Author

Vincenzo Librandi, Mar 14 2010

Status

approved