%I
%S 1,2,3,4,5,6,7,8,9,10,11,12,21,29,31,32,35,36,37,38,39,43,48,49,53,54,
%T 55,56,65,67,75,76,77,78,86,87,88,89,95,96,97,98,99,106,107,108,109,
%U 110,111,112,120,123,132,192,210,212,213,231,251,312,318,319,321,324
%N a(n) is the smallest term appearing after a(n1) in A067581.
%e a(13) = 21 because 21 is the lowest term appearing after 12 in A067581
%Y Cf. A067581.
%K base,easy,nonn
%O 1,2
%A _Johan SĂ¤rnbratt_, Mar 27 2008
