OFFSET
1,2
COMMENTS
Also numbers n such that (22*10^n+41)/9 is prime.
a(15) > 10^5. - Robert Price, Feb 05 2015
LINKS
FORMULA
a(n) = A101960(n) + 1.
MATHEMATICA
Do[ If[ PrimeQ[(22*10^n + 41)/9], Print[n]], {n, 0, 10000}]
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Dec 17 2004
EXTENSIONS
Addition of a(10)-a(11) from Kamada data by Robert Price, Dec 13 2010
a(12) from Erik Branger May 01 2013 by Ray Chandler, Aug 16 2013
a(13)-a(14) from Robert Price, Feb 05 2015
STATUS
approved