OFFSET
1,3
COMMENTS
Also numbers n such that (8*10^n+7)/3 is prime.
LINKS
FORMULA
a(n) = A101965(n-1) + 1.
MATHEMATICA
Do[ If[ PrimeQ[(8*10^n + 7)/3], Print[n]], {n, 0, 10000}]
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Dec 17 2004
EXTENSIONS
Addition of a(17)-a(21) from Kamada data by Robert Price, Dec 10 2010
0 added by Arkadiusz Wesolowski, Mar 10 2011
a(22) from Erik Branger May 01 2013 by Ray Chandler, Aug 16 2013
STATUS
approved