%I #7 Dec 05 2013 19:55:12
%S 7,97,997,9973,99991,999979,9999991,99999971,999999937,9999999557,
%T 99999999977,999999999959,9999999999971,99999999999973,
%U 999999999999577,9999999999999937,99999999999999997,999999999999999737
%N Largest ndigit prime with all odd digits.
%F a(n)<=A003618(n).  _R. J. Mathar_, May 18 2007
%Y Cf. A068690, A068691, A068692, A068693.
%Y Cf. A003618.
%K base,nonn
%O 1,1
%A _Amarnath Murthy_, Mar 03 2002
%E More terms from _Sascha Kurz_, Mar 17 2002
