OFFSET
1,2
COMMENTS
a(26) > 10^5. - Robert Price, Feb 13 2016
EXAMPLE
15 is a member since 615+515 = 476288500201 which is a prime number.
MATHEMATICA
Do[ If[ PrimeQ[6^n + 5^(n - 1)], Print[n]], {n, 4000]
PROG
(PARI) is(n)=isprime(6^n+5^(n-1)) \\ Charles R Greathouse IV, Feb 17 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
Herman H. Rosenfeld (herm3(AT)pacbell.net), May 17 2004
EXTENSIONS
More terms from Robert G. Wilson v, Jun 18 2004
a(19)-a(25) from Robert Price, Feb 13 2016
STATUS
approved