OFFSET
1,1
COMMENTS
Also numbers n such that (26*10^n-71)/9 is prime.
a(15) > 10^5. - Robert Price, Mar 16 2015
LINKS
FORMULA
a(n) = A101969(n) + 1.
MATHEMATICA
Do[ If[ PrimeQ[(26*10^n - 71)/9], Print[n]], {n, 10000}]
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Dec 17 2004
EXTENSIONS
Addition of a(12)-a(13) from Kamada data by Robert Price, Dec 13 2010
a(14) from Robert Price, Mar 16 2015
Erroneous zero term deleted by Robert Price, Mar 17 2015
STATUS
approved