OFFSET
1,2
COMMENTS
Also numbers n such that (88*10^n-43)/9 is prime.
a(16) > 10^5. - Robert Price, Nov 12 2015
LINKS
FORMULA
a(n) = A101015(n-1) + 1, for n>1.
MATHEMATICA
Do[ If[ PrimeQ[(88*10^n - 43)/9], Print[n]], {n, 0, 10000}]
PROG
(PARI) is(n)=isprime(9*10^n + 7*((10^n-1)/9) - 4) \\ Anders Hellström, Nov 12 2015
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Jan 19 2005
EXTENSIONS
a(11)-a(12) from Kamada data by Robert Price, Dec 14 2010
Inserted a(1)=0 and added a(13)-a(15) from Robert Price, Nov 12 2015
STATUS
approved