%I
%S 0,0,1,1,2,2,3,3,5,5,7,7,8,8,10,10,11,11,12,12,13,13,14,14,16,16,17,
%T 17,18,18,19,19,20,20,21,21,22,22,23,23,24,24,26,26,27,27,28,28,29,29,
%U 30,30,31,31,32,32,33,33,34,34,36,36,37,37,38,38,39,39,40,40,41,41,42,42
%N Beginning with a(0)=0, take a(n) to be the smallest number not equal to the product of two consecutive (not distinct) earlier terms.
%Y For a(n) not equal to the product of two consecutive (distinct) earlier terms: Cf. A121229.
%K easy,nonn
%O 1,5
%A _Giovanni Teofilatto_, Aug 23 2006
