OFFSET
1,3
COMMENTS
Also numbers n such that (71*10^n-53)/9 is prime.
a(14) > 10^5. - Robert Price, Oct 06 2015
LINKS
FORMULA
a(n) = A101151(n-1) + 1 for n>1.
EXAMPLE
For n=0, (71*10^n-53)/9 = 2 which is prime.
MATHEMATICA
Do[ If[ PrimeQ[(71*10^n - 53)/9], Print[n]], {n, 0, 10000}]
PROG
(PARI) for(n=0, 10^5, if(isprime((71*10^n-53)/9), print1(n", "))); \\ Altug Alkan, Oct 06 2015
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Jan 19 2005
EXTENSIONS
a(10)-a(12) from Kamada data by Robert Price, Dec 14 2010
Inserted a(1)=0 and added a(13) by Robert Price, Oct 06 2015
STATUS
approved