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%I M0465 #8 Mar 30 2012 16:44:55
%S 1,1,2,3,4,5,6,6,7,8,9,10,11,12,12,12,13,14,15,16,17,18,19,19,20,20,
%T 21,22,23,24,25,26,27,28,28,29,30,30,31,32,33,34,35,36,37,38,39,39,40,
%U 41,42,42,42,42,43,44,45,46,47,48,49,50,51,52,52,53,54,55,56,56,57,57,58
%N a(n)=a(a(n-1)-4)+a(n+4-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,easy
%O 1,3
%A _N. J. A. Sloane_.
%E More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Mar 28 2003