OFFSET
1,2
LINKS
Joerg Arndt, Table of n, a(n) for n = 1..81 (from http://www.prothsearch.com/riesel1.html)
Ray Ballinger, Proth Search Page
Ray Ballinger and Wilfrid Keller, List of primes k.2^n + 1 for k < 300
Wilfrid Keller, List of primes k.2^n - 1 for k < 300
PROG
(PARI) is(n)=ispseudoprime(81*2^n+1) \\ Charles R Greathouse IV, Jun 07 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved