OFFSET
1,1
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
EXAMPLE
E.g., for 2 digit primes: (3, 7, 9) = (2, 6, 8) + 1.
MAPLE
N:= 1000; # to get the first N entries
A241212[1]:= 23:
A241212[2]:= 67:
A241212[3]:= 89:
count:= 3:
for n from 2 while count < N do
for x1 from 10^(n-1) to 9*10^(n-1)-2 by 2 while count < N do
L:= convert(x1, base, 10);
if has(L, 9) then next fi;
x:= 10^n*x1 + x1 + (10^n - 1)/9;
if isprime(x) then
count:= count+1;
A241212[count]:= x
fi;
od
od: # Robert Israel, Apr 18 2014
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Zak Seidov, Apr 17 2014
EXTENSIONS
Incorrect cross-reference deleted by Robert Israel, Apr 18 2014
STATUS
approved