%I
%S 0,2,4,7,10,14,19,24,30,37,44,52,61,71,81,92,104,117,131,145,160,176,
%T 193,211,229,248,268,289,311,334,357,381,406,432,459,487,516,545,575,
%U 606,638,671,705,740,775,811,848,886,925,965,1006,1048,1090,1133,1177
%N a(0)=0. a(n) = a(n1) + 1 + (number of positive integers which are <= n and are missing from {a(0),a(1),a(2),...a(n1)}).
%e The sequence of positive integers not in this sequence begins 1, 3, 5, 6, 8,...
%e Because there are four such terms <= 7, then a(7) = a(6) + 1 + 4 = 24.
%K easy,nonn
%O 0,2
%A _Leroy Quet_, Apr 08 2006, definition corrected Apr 22 2006
%E More terms from Sheedeh Dorri (spd145(AT)psu.edu), Apr 17 2006
