OFFSET
1,3
COMMENTS
a(22) > 10^4. - Jinyuan Wang, Jan 31 2020
MATHEMATICA
Do[ If[ PrimeQ[(11*13^n - 1)/2], Print[n]], {n, 0, 2700}]
PROG
(PARI) is(n)=ispseudoprime((11*13^n-1)/2) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Robert G. Wilson v, Sep 10 2000
EXTENSIONS
a(21) from Jinyuan Wang, Jan 31 2020
a(22) from Michael S. Branicky, Jul 11 2024
STATUS
approved