OFFSET
1,2
COMMENTS
Also numbers n such that (76*10^n+23)/9 is prime.
a(10) > 10^5. - Robert Price, Oct 18 2015
LINKS
FORMULA
a(n) = A101068(n-1) + 1 for n>1.
MATHEMATICA
Do[ If[ PrimeQ[(76*10^n + 23)/9], Print[n]], {n, 0, 10000}]
PROG
(PARI) for(n=0, 1e5, if(isprime(k=(76*10^n+23)/9), print1(n", "))) \\ Altug Alkan, Oct 19 2015
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Jan 19 2005
EXTENSIONS
a(9) from Erik Branger May 01 2013 by Ray Chandler, Aug 16 2013
Inserted a(1)=0 by Robert Price, Oct 18 2015
STATUS
approved