OFFSET
1,1
COMMENTS
101 and 97 are primes.
LINKS
Michael De Vlieger, Table of n, a(n) for n = 1..10000
EXAMPLE
k=7 and k=83 are in the sequence because 10197k = 101977 and 10197k = 1019783 are prime.
MATHEMATICA
Select[Range[10^3], PrimeQ[10197*10^IntegerLength[#] + #] &] (* Michael De Vlieger, Jan 22 2018 *)
PROG
(Magma) [ n: n in [1..1750] | IsPrime(Seqint(Intseq(n) cat [7, 9, 1, 0, 1])) ]; // Vincenzo Librandi, Feb 02 2011
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Parthasarathy Nambi, Jun 30 2005
STATUS
approved