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0,4
a(n)<=n-1; apparently a(n-1)<=a(n)<=a(n-1)+1.
Table of n, a(n) for n=0..63.
a := proc(n) option remember; if n<=2 then 1 else a(a(n-3))+a(n-a(n-3)); fi; end;
Cf. A004001, A005229.
Sequence in context: A277814 A006162 A036701 * A210436 A003004 A120507
Adjacent sequences: A053753 A053754 A053755 * A053757 A053758 A053759
easy,nonn
Henry Bottomley, Apr 05 2000
approved