OFFSET
1,2
COMMENTS
Also numbers n such that (73*10^n+71)/9 is prime.
a(18) > 10^5. - Robert Price, Oct 13 2015
LINKS
FORMULA
a(n) = A101060(n) + 1.
MATHEMATICA
Do[ If[ PrimeQ[(73*10^n + 71)/9], Print[n]], {n, 0, 10000}]
Select[Range[0, 100000], PrimeQ[(73 10^# + 71)/9] &] (* Vincenzo Librandi, Oct 14 2015 *)
PROG
(Magma) [n: n in [0..400] | IsPrime((73*10^n+71) div 9)]; // Vincenzo Librandi, Oct 14 2015
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Jan 19 2005
EXTENSIONS
a(16)-a(17) from Kamada data by Robert Price, Dec 14 2010
STATUS
approved