OFFSET
1,1
COMMENTS
Also numbers k such that (47*10^k + 43)/9 is prime.
a(22) > 10^5. - Robert Price, Jul 10 2015
LINKS
FORMULA
a(n) = A101575(n) + 1.
MATHEMATICA
Do[ If[ PrimeQ[(46*10^n + 43)/9], Print[n]], {n, 0, 10000}]
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Robert G. Wilson v, Jan 18 2005
EXTENSIONS
a(17)-a(18) from Kamada data by Robert Price, Dec 14 2010
a(19)-a(21) from Erik Branger May 01 2013 by Ray Chandler, Aug 16 2013
STATUS
approved