OFFSET
1,2
COMMENTS
Also numbers n such that (71*10^n+1)/9 is prime.
LINKS
FORMULA
a(n) = A101153(n) + 1.
MATHEMATICA
Do[ If[ PrimeQ[(71*10^n + 1)/9], Print[n]], {n, 0, 10000}]
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Jan 19 2005
EXTENSIONS
a(10)-a(13) from Kamada data by Robert Price, Dec 14 2010
STATUS
approved