OFFSET
1,1
COMMENTS
Also numbers n such that (59*10^n+31)/9 is prime.
a(16) > 10^5. - Robert Price, Sep 13 2015
LINKS
FORMULA
a(n) = A101534(n) + 1.
MATHEMATICA
Do[ If[ PrimeQ[(59*10^n + 31)/9], Print[n]], {n, 0, 10000}]
PROG
(PARI) is(n)=isprime(6*10^n + 5*(10^n-1)/9 + 4) \\ Anders Hellström, Sep 13 2015
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Jan 18 2005
EXTENSIONS
a(14)-a(15) from Robert Price, Sep 13 2015
STATUS
approved