OFFSET
0,3
LINKS
Felix Fröhlich, Table of n, a(n) for n = 0..1000
EXAMPLE
The smallest prime whose decimal expansion starts with 10^6 = 1000000 is 100000037, so a(6) = 37.
PROG
(PARI) a(n) = my(k=1); while(!ispseudoprime(eval(Str(10^n, k))), k++); k
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Felix Fröhlich, Aug 02 2015
STATUS
approved