%I #10 Jan 21 2022 23:30:11
%S 3,1,3,111111111111111,33333,
%T 111111111111111111111111111111111111111111111111111111111111111111111111111111111111111,
%U 3333,111111111111111111111111111,33333
%N Copies of 3 and 1 alternately such that every partial concatenation is a prime.
%C The next term has 168 digits. - _Charles R Greathouse IV_, Sep 29 2008
%e 3, 31, 313, 313111111111111111, ... are all prime.
%Y Cf. A110774, A110775, A110776, A110777, A110778, A110779, A110780, A110781, A110782, A110783, A110788, A110789, A110791.
%K base,easy,nonn
%O 1,1
%A _Amarnath Murthy_, Aug 13 2005
%E a(6)-a(9) from_Charles R Greathouse IV_, Sep 29 2008