OFFSET
1,2
LINKS
H. v. Eitzen, Table of n, a(n) for n = 1..10000.
EXAMPLE
313, 131, 919, 191, 17117, 1171, 21121, etc. are primes.
PROG
(PARI) tp(n)=10^ceil(log(n+0.5)/log(10)); seen=Set([]); a=[1]; while(#a<100, n=a[ #a]; tn=tp(n); k=1; while(!isprime(z=(k*tn+n)*tp(k)+k) || setsearch(seen, z), k+=2); seen=setunion(seen, [z]); a=concat(a, k)); a \\ Hagen von Eitzen, Jun 21 2009
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Nov 28 2003
EXTENSIONS
a(14) corrected and more terms added by Hagen von Eitzen, Jun 21 2009
STATUS
approved