%I #8 Sep 08 2018 03:11:13
%S 1,2,132,735,21372,271362,4773132,113678565,11317129824
%N Smallest number containing exactly n prime factors in its decimal representation.
%C A131929(a(n)) = n and A131929(m) <> n for m<a(n).
%e a(2) = 2^2 * 3 * 11 = 132 containing 2 and 3;
%e a(3) = 3 * 5 * 7^2 = 735 containing 3, 5 and 7;
%e a(4) = 2^2 * 3 * 13 * 137 = 21372 containing 2, 3, 13 and 137;
%e a(5) = 2 * 3 * 7^2 * 13 * 71 = 271362 containing 2, 3, 7, 13 and 71.
%Y Cf. A131930, A131929, A318965.
%K nonn,base,more
%O 0,2
%A _Reinhard Zumkeller_, Jul 30 2007
%E Offset changed by and a(6)a(8) from _Giovanni Resta_, Sep 06 2018
