OFFSET
1,2
COMMENTS
Also numbers n such that (64*10^n+17)/9 is prime.
a(8) > 10^5. - Robert Price, Sep 18 2015
LINKS
FORMULA
a(n) = A101131(n) + 1.
MATHEMATICA
Do[ If[ PrimeQ[(64*10^n + 17)/9], Print[n]], {n, 0, 10000}]
PROG
(PARI) is(n)=isprime((64*10^n + 17)/9) \\ Anders Hellström, Sep 18 2015
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Jan 19 2005
EXTENSIONS
a(5)-a(6) from Kamada data by Robert Price, Dec 14 2010
a(7) from Robert Price, Sep 18 2015
STATUS
approved