OFFSET
1,3
COMMENTS
Also numbers n such that (29*10^n-11)/9 is prime.
a(18) > 10^5. - Robert Price, Apr 04 2015
LINKS
FORMULA
a(n) = A101828(n-1) + 1.
MATHEMATICA
Do[ If[ PrimeQ[(29*10^n-11)/9], Print[n]], {n, 0, 10000}]
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Dec 17 2004
EXTENSIONS
Addition of a(12)-a(14) from Kamada data by Robert Price, Dec 13 2010
a(15) from Erik Branger May 01 2013 by Ray Chandler, Aug 16 2013
a(16)-a(17) from Robert Price, Apr 04 2015
STATUS
approved