OFFSET
1,2
EXAMPLE
6 is a term because (1/99)*(89 + 10^(2*6+1)) = 101010101011, a prime.
PROG
(PARI) is(n)=isprime((89+10^(2*n+1))/99) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
Jason Earls, Aug 19 2003
EXTENSIONS
a(9)-a(10) from David Wasserman, Feb 03 2005
a(11)-a(12) from L. Joris Perrenet
a(13)-a(14) from Michael S. Branicky, Apr 12 2024
STATUS
approved