OFFSET
1,2
COMMENTS
Also numbers k such that (5*10^k - 11)/3 is prime.
a(16) > 10^5. - Robert Price, Nov 15 2014
LINKS
FORMULA
a(n) = A102023(n) + 1.
MAPLE
A102939:=n->`if`(isprime((5*10^n-11)/3), n, NULL): seq(A102939(n), n=1..1000); # Wesley Ivan Hurt, Nov 15 2014
MATHEMATICA
Do[ If[ PrimeQ[(5*10^n - 11)/3], Print[n]], {n, 0, 10000}]
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Dec 16 2004
EXTENSIONS
Addition of a(12)-a(13) from Kamada data by Robert Price, Dec 12 2010
a(14)-a(15) from Kamada data by Robert Price, Nov 15 2014
a(16) from Kamada data by Tyler Busby, Apr 16 2024
STATUS
approved