OFFSET
1,1
COMMENTS
Also numbers n such that (13*10^n+17)/3 is prime.
a(24) > 10^5. - Robert Price, Jun 25 2015
LINKS
FORMULA
a(n) = A101725(n) + 1.
MATHEMATICA
Do[ If[ PrimeQ[(13*10^n + 17)/3], Print[n]], {n, 0, 10000}]
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Jan 17 2005
EXTENSIONS
Addition of a(18)-a(19) from Kamada data by Robert Price, Dec 10 2010
a(20) from Erik Branger, May 01 2013, submitted by Ray Chandler, Aug 16 2013
a(21)-a(23) from Robert Price, Jun 25 2015
STATUS
approved