OFFSET
1,2
COMMENTS
Also numbers n such that (13*10^n-7)/3 is prime.
a(30) > 10^5. - Robert Price, Mar 30 2015
LINKS
FORMULA
a(n) = A101723(n) + 1.
MATHEMATICA
Do[ If[ PrimeQ[(13*10^n - 7)/3], Print[n]], {n, 1, 10000}]
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Jan 17 2005
EXTENSIONS
Addition of a(26)-a(28) from Kamada data by Robert Price, Dec 08 2010
a(29) from Erik Branger, May 01 2013, submitted by Ray Chandler, Aug 16 2013
STATUS
approved