OFFSET
1,1
COMMENTS
Also numbers n such that (77*10^n+13)/9 is prime.
a(8) > 10^5. - Robert Price, Oct 25 2015
LINKS
FORMULA
a(n) = A101072(n) + 1.
MATHEMATICA
Do[ If[ PrimeQ[(77*10^n + 13)/9], Print[n]], {n, 0, 10000}]
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Jan 19 2005
EXTENSIONS
a(4)-a(6) from Kamada data by Robert Price, Dec 14 2010
a(7) from Robert Price, Oct 25 2015
STATUS
approved