OFFSET
1,2
COMMENTS
Also numbers n such that (19*10^n+11)/3 is prime.
a(25) > 3*10^5. - Robert Price, Oct 26 2023
LINKS
FORMULA
a(n) = A101526(n) + 1.
MATHEMATICA
Do[ If[ PrimeQ[(19*10^n + 11)/3], Print[n]], {n, 0, 10000}]
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Jan 18 2005
EXTENSIONS
Addition of a(19)-a(20) from Kamada data by Robert Price, Dec 10 2010
a(21)-a(22) from Erik Branger May 01 2013 by Ray Chandler, Aug 16 2013
a(23)-a(24) from Robert Price, Oct 26 2023
STATUS
approved