OFFSET
1,3
COMMENTS
Also numbers n such that (76*10^n-13)/9 is prime.
a(20) > 10^5. - Robert Price, Oct 20 2015
LINKS
FORMULA
a(n) = A101067(n-1) + 1, for n>1.
MATHEMATICA
Do[ If[ PrimeQ[(76*10^n - 13)/9], Print[n]], {n, 0, 10000}]
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Jan 19 2005
EXTENSIONS
a(18) from Kamada data by Robert Price, Dec 14 2010
Inserted a(1)=0 by Robert Price, Oct 20 2015
STATUS
approved