OFFSET
1,2
COMMENTS
Also numbers n such that (58*10^n-13)/9 is prime.
a(28) > 10^5. - Robert Price, Sep 12 2015
LINKS
FORMULA
a(n) = A101528(n-1) + 1 for n>1.
MATHEMATICA
Do[ If[ PrimeQ[(58*10^n - 13)/9], Print[n]], {n, 0, 10000}]
PROG
(PARI) is(n)=isprime(6*10^n + 4*(10^n-1)/9 - 1) \\ Anders Hellström, Sep 12 2015
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Jan 18 2005
EXTENSIONS
a(21)-a(23) from Kamada data by Robert Price, Dec 14 2010
a(24)-a(25) from Erik Branger May 01 2013 by Ray Chandler, Aug 16 2013
Inserted a(1)=0 by Robert Price, Sep 12 2015
a(26)-a(27) from Robert Price, Sep 12 2015
STATUS
approved