OFFSET

1,3

COMMENTS

Also numbers k such that (11*10^k + 7)/9 is prime.

a(14) > 10^5. - Robert Price, Nov 15 2014

a(14) > 2*10^5. - Tyler Busby, Feb 01 2023

LINKS

FORMULA

a(n) = A102009(n-1) + 1.

MATHEMATICA

Do[ If[ PrimeQ[(11*10^n + 7)/9], Print[n]], {n, 0, 10000}]

CROSSREFS

KEYWORD

more,nonn

AUTHOR

Robert G. Wilson v, Dec 16 2004

EXTENSIONS

Addition of a(12) from Kamada data by Robert Price, Dec 13 2010

Inserted a(1)=0 by Robert Price, Nov 15 2014

a(13) from Kamada data by Robert Price, Nov 15 2014

STATUS

approved