OFFSET
1,1
COMMENTS
Also numbers n such that (22*10^n+23)/9 is prime.
a(15) > 10^5. - Robert Price, Mar 15 2015
LINKS
FORMULA
a(n) = A101959(n) + 1.
MATHEMATICA
Do[ If[ PrimeQ[(22*10^n + 23)/9], Print[n]], {n, 0, 10000}]
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Dec 17 2004
EXTENSIONS
Addition of a(12)-a(13) from Kamada data by Robert Price, Dec 12 2010
a(14) from Robert Price, Mar 15 2015
STATUS
approved