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%I M0450 #8 Mar 30 2012 16:44:55
%S 1,1,2,3,4,4,5,6,7,8,8,8,9,10,11,12,13,13,14,14,15,16,17,18,19,20,20,
%T 21,22,22,22,22,23,24,25,26,27,28,29,29,30,31,32,32,33,33,34,34,35,36,
%U 37,38,39,40,41
%N a(n)=a(a(n-1)-2)+a(n+2-a(n-1)).
%D J. Arkin, D. C. Arney, L. S. Dewald and W. E. Ebel, Jr., Families of recursive sequences, J. Rec. Math., 22 (No. 22, 1990), 85-94.
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%K nonn
%O 1,3
%A _N. J. A. Sloane_.
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