%I #5 Mar 30 2012 18:39:10

%S 1,1,2,2,3,4,4,5,5,6,7,7,8,8,9,9,10,10,11,12,12,13,13,14,14,15,16,16,

%T 17,17,18,18,19,19,20,21,21,22,22,23,23,24,25,25,26,26,27,28,28,29,29,

%U 30,30,31,32,32,33,33,34,34,35,35,36,37,37,38,38,39,39,40,41,41,42,42

%N a(1)=1, a(n)=n-a(n-1)+a(a(n-1))-a(a(a(n-1))).

%F Conjecture: let c be the real root of 1-2*x+x^2-x^3, c=0.5698402909980532659113..., then a(n)=floor(cn) +0 /+ 1

%K nonn

%O 1,3

%A _Benoit Cloitre_, Nov 27 2002