OFFSET
1,2
COMMENTS
Also numbers k such that (16*10^k - 43)/9 is prime.
a(11) > 10^5. - Robert Price, Feb 11 2015
LINKS
FORMULA
a(n) = A102027(n) + 1.
MATHEMATICA
Do[ If[ PrimeQ[(16*10^n - 43)/9], Print[n]], {n, 0, 10000}]
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Dec 16 2004
EXTENSIONS
a(10) from Robert Price, Feb 11 2015
STATUS
approved