OFFSET
1,2
COMMENTS
Also numbers n such that (74*10^n+7)/9 is prime.
a(25) > 10^5. - Robert Price, Oct 15 2015
LINKS
FORMULA
a(n) = A101062(n) + 1.
MATHEMATICA
Do[ If[ PrimeQ[(74*10^n + 7)/9], Print[n]], {n, 0, 10000}]
PROG
(PARI) for(n=0, 50000, if(isprime((74*10^n+7)/9), print1(n", "))) \\ Altug Alkan, Oct 15 2015
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Jan 19 2005
EXTENSIONS
a(20)-a(21) from Kamada data by Robert Price, Dec 14 2010
a(22)-a(24) from Erik Branger May 01 2013 by Ray Chandler, Aug 16 2013
STATUS
approved