OFFSET
1,2
COMMENTS
Also numbers k such that (14*10^k - 23)/9 is prime.
a(9) > 10^5. - Robert Price, Apr 10 2015
LINKS
FORMULA
a(n) = A102019(n) + 1.
MATHEMATICA
Do[ If[ PrimeQ[(14*10^n - 23)/9], Print[n]], {n, 0, 10000}]
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Dec 16 2004
EXTENSIONS
Addition of a(7) from Kamada data by Robert Price, Dec 13 2010
a(8) from Robert Price, Apr 10 2015
STATUS
approved