%N Prime generalized Catalan numbers.
%C A004148(n) for n = 3, 6, 7, 22, no more through 70. Note that Koshy and Salmassi give an elementary proof that the only prime Catalan numbers A000108 are a(2) = 2 and a(3) = 5.
%C The next term, if it exists, has more than 2000 digits. - _Charles R Greathouse IV_, May 13 2012
%F A004148 INTERSECTION A000040.
%Y Cf. A000040, A000108, A004148, A092840.
%A _Jonathan Vos Post_, May 13 2012