OFFSET
1,1
LINKS
Pierre CAMI, Table of n,a(n) for n=1,...,3000
EXAMPLE
The primes are 19, 199, 1999, 49999, 199999, 2999999,
19999999, 799999999, 10999999999, 59999999999, ...,.
MATHEMATICA
f[n_] := Block[{k = 1}, While[ !PrimeQ[k*10^n - 1], k++ ]; k]; Array[f, 79] (* Robert G. Wilson v *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Jonathan Vos Post, Aug 17 2006
EXTENSIONS
a(11) onwards from Robert G. Wilson v, Aug 20 2006
STATUS
approved