OFFSET
1,3
COMMENTS
Also numbers k such that (26*10^k+7)/3 is prime.
LINKS
FORMULA
a(n) = A101075(n-1) + 1 for n >= 2.
MATHEMATICA
Do[ If[ PrimeQ[(26*10^k + 7)/3], Print[k]], {k, 0, 10000}]
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Jan 19 2005
EXTENSIONS
a(15)-a(17) from Kamada data by Robert Price, Dec 14 2010
a(1)=0 inserted by Georg Fischer, Jan 03 2021
a(18) from Kamada data by Tyler Busby, May 03 2024
STATUS
approved