OFFSET
1,2
COMMENTS
Also numbers n such that (35*10^n-71)/9 is a prime.
a(23) > 10^5. - Robert Price, May 20 2015
LINKS
FORMULA
a(n) = A101844(n) + 1.
MATHEMATICA
Do[ If[ PrimeQ[(35*10^n - 71)/9], Print[n]], {n, 0, 10000}]
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Dec 17 2004
EXTENSIONS
Addition of a(17)-a(20) from Kamada data by Robert Price, Dec 10 2010
a(21)-a(22) from Robert Price, May 20 2015
STATUS
approved