OFFSET
1,1
COMMENTS
Primes p such that exactly one of 2^p-1 and 2^p+1 is prime.
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..47
FORMULA
a(n) = A000043(n+1).
MATHEMATICA
MersennePrimeExponent[Range[2, 48]] (* Amiram Eldar, Oct 21 2024 *)
CROSSREFS
KEYWORD
nonn,changed
AUTHOR
Juri-Stepan Gerasimov, Mar 14 2010
EXTENSIONS
Corrected by Charles R Greathouse IV, Mar 19 2010
STATUS
approved