OFFSET
1,1
COMMENTS
Also numbers n such that (43*10^n+11)/9 is prime.
a(10) > 10^5. - Robert Price, Jun 01 2015
LINKS
FORMULA
a(n) = A101733(n) + 1.
MATHEMATICA
Do[ If[ PrimeQ[(43*10^n + 11)/9], Print[n]], {n, 0, 10000}]
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Jan 17 2005
EXTENSIONS
a(8) from Erik Branger, May 01 2013, submitted by Ray Chandler, Aug 16 2013
a(9) from Robert Price, Jun 01 2015
STATUS
approved