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%I #8 Jul 04 2019 19:03:52
%S 1,2,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,6,10,7,11,8,12,8,13,7,14,7,15,8,16,
%T 8,17,7,18,12,13,10,13,10,14,11,15,11,15,12,16,12,17,10,17,11,18,18,
%U 19,12,19,12,20,15,16,16,16,16,17,14,17,14,18,24,18,24,19,15,19,16,20,20,20
%N a(1)=1, a(n) = ceiling(n/a(a(a(n-1)))).
%K nonn
%O 1,2
%A _Benoit Cloitre_, Dec 31 2002